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pappubahry
22-05-2018, 08:17 PM
The 2018 WA Championship started on Sunday, a seven-round open swiss played at North Woodvale Primary School (Perth Chess Club). Norbert Muller is DOP.

Only one former state champion is in the field (Craig Kinsman, 1984):


Kurniawan,Stephanus 2369
Gong,Patrick 2352 FM
Maggs,Derwent 2257
Ferozkohi,Ihsan 2238
Hardegen,Andrew 2131
Kelly,Adam 2104 CM
Lakner,Jay 2098
Maris,Robert 1987
Hardegen,Kathryn (W) 1983 WFM
Kinsman,Craig C 1961
Dunlop,Gordon 1895
Fu,Yihe (Rebo) 1892
Shaw,Robin A 1791
Wolstencroft,Alan 1753
Simonds,Marcus 1725
Maris,Natalie A 1679
Hintz,Steven 1592
Gale,Brian 1502
Barry,David 1480
Milovanovic,Stevica 1208
Laugery,Bernard A 1126
Ong,Celine 851
Gao,Oscar 763
Singh,Gurpreet 0

Kathryn Hardegen withdrew before the tournament started, but perhaps because one game had already been rescheduled, there wasn't a re-draw, and Derwent got a win on forfeit. Round one results:


1 = Kurniawan,Stephanus ( 0.0) - Lakner,Jay ( 0.0) = 1 - 7 = 1 - 0
-----------------------------------------------------------------------------------
2 = Maris,Robert ( 0.0) - Gong,Patrick ( 0.0) = 8 - 2 = 0 - 1
-----------------------------------------------------------------------------------
3 = Maggs,Derwent ( 0.0) - Hardegen,Kathryn ( 0.0) = 3 - 9 = 1F-0F
-----------------------------------------------------------------------------------
4 = Kinsman,Craig C ( 0.0) - Ferozkohi,Ihsan ( 0.0) = 10 - 4 = -
-----------------------------------------------------------------------------------
5 = Hardegen,Andrew ( 0.0) - Dunlop,Gordon ( 0.0) = 5 - 11 = 1 - 0
-----------------------------------------------------------------------------------
6 = Fu,Yihe (Rebo) ( 0.0) - Kelly,Adam ( 0.0) = 12 - 6 = 0 - 1
-----------------------------------------------------------------------------------
7 = Shaw,Robin A ( 0.0) - Barry,David ( 0.0) = 13 - 19 = 0 - 1
-----------------------------------------------------------------------------------
8 = Milovanovic,Stevica ( 0.0) - Wolstencroft,Alan ( 0.0) = 20 - 14 = 0 - 1
-----------------------------------------------------------------------------------
9 = Simonds,Marcus ( 0.0) - Laugery,Bernard A ( 0.0) = 15 - 21 = 1 - 0
-----------------------------------------------------------------------------------
10 = Ong,Celine ( 0.0) - Maris,Natalie A ( 0.0) = 22 - 16 = 0 - 1
-----------------------------------------------------------------------------------
11 = Hintz,Steven ( 0.0) - Gao,Oscar ( 0.0) = 17 - 23 = 1 - 0
-----------------------------------------------------------------------------------
12 = Singh,Gurpreet ( 0.0) - Gale,Brian ( 0.0) = 24 - 18 = 0 - 1

pappubahry
22-05-2018, 08:27 PM
I won my round one game. :eek: It's my biggest win by almost 300 points, and that it came from a gross blunder in the endgame when I was totally lost, doesn't stop me enjoying it. :lol:

[Event "WA Championship 2018"]
[Date "2018.05.20"]
[Round "1"]
[White "Shaw, Robin"]
[Black "Barry, David"]
[Result "0-1"]
[WhiteElo "1791"]
[BlackElo "1480"]

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 Be7 6.Bc4 d6 7.O-O Nf6 8.Qe2 O-O 9.Rd1 Qc7 10.Bf4 a6 11.e5 Nh5 12.exd6 Nxf4 13.dxc7 Nxe2+ 14.Bxe2 Nc6 15.Na4 b5 16.Rac1 bxa4 17.Rxc6 Ra7 18.Rc4 Rb7 19.Rd2 Bf6 20.Rcc2 g5 21.h3 Ra7 22.Rc5 h6 23.g4 Rb7 24.Bxa6 Rxb2 25.Rxb2 Bxb2 26.Bxc8 Rxc8 27.Rb5 Rxc7 28.Rxb2 Rc3 29.Kg2 a3 30.Rb3 Rxb3 31.Nd2 Rb2 32.Nc4 Rxa2 0-1

idledim
23-05-2018, 10:47 AM
Thanks for keeping us up to date on this event - and congratulations on your win over Robin.

Andrew Hardegen
23-05-2018, 01:42 PM
Yes, thanks for the posts pappubahry.

This 24 player, 7 round tournament is using accelerated pairings. I'm not convinced of Norbert's motivation for this, other than to avoid the so-called `junk' round. But we all remember how badly this went at the 2017 Christmas Open (http://www.chesschat.org/showthread.php?17048-2017-CAWA-Christmas-Open-18th-amp-19th-November).

The strong players in this tournament do not like accelerated pairings, as they result in weaker players spending more time on the top boards, and thus, greater imbalance in leading players' pairings. Some top players play several weak opponents; others play very few. The WA Open Championship should be about determining who WA's best player is. It should not be designed to coddle weaker players and make them feel good.

Kathryn withdrew nearly 24 hours before the start of the round. Norbert was given plenty of notice. But he insisted on doing nothing, and gave Kathryn's 2257-rated Round 1 opponent a free point.

The Round 2 pairings are very strange. Norbert is apparently using Vega but I am not sure which engine he is using -- something is certainly wrong here.

3630

I did a manual pairing, maintaining the accelerated 1 point for players 1-12 in Round 2, and I get:

Maggs (1) - Kurniawan (1)
Gong (1) - Hardegen,A (1)
Kelly (1) - Kinsman (0.5)
Ferozkohi (0.5) - Lakner (0)
Maris,N (1) - Maris,R (0)
Dunlop (0) - Simonds (1)
Gale (1) - Fu (0)
Wolstencroft (1) - Hintz (1)
Barry (1) - Milovanovic (0)
Laugery (0) - Singh (0)
Gao (0) - Ong (0)

pappubahry
23-05-2018, 02:16 PM
I'm glad it's not just me wondering about the round two pairings! I'd set up a "shadow" Vega file for myself so that I could see next week's pairings early, and I get something like (maybe identical to -- I'm not on my home computer at the moment) your manual pairings.

I emailed Norbert yesterday about Lakner being on board 9, and he said he'd looked at it closely and it was correct. I don't know the mechanics of Swiss pairings though, I just know how to click the 'automatic' button in Vega, so I can't really argue it.

Andrew Hardegen
23-05-2018, 02:24 PM
I'm glad it's not just me wondering about the round two pairings! I'd set up a "shadow" Vega file for myself so that I could see next week's pairings early, and I get something like (maybe identical to -- I'm not on my home computer at the moment) your manual pairings.

I've just done the same. Vega produces my manual pairings for Round 2.


I emailed Norbert yesterday about Lakner being on board 9, and he said he'd looked at it closely and it was correct. I don't know the mechanics of Swiss pairings though, I just know how to click the 'automatic' button in Vega, so I can't really argue it.

Yes, this sounds like Norbert. It is his standard response to everything.

Norbert, as arbiter, should be expected to explain the reasoning behind the pairings.

I'll email my worked pairings to Norbert and the participants when I have time, probably tonight.

If Norbert doesn't change the pairings, then he can suffer the consequences.

MichaelBaron
23-05-2018, 07:55 PM
I won my round one game. :eek: It's my biggest win by almost 300 points, and that it came from a gross blunder in the endgame when I was totally lost, doesn't stop me enjoying it. :lol:

[Event "WA Championship 2018"]
[Date "2018.05.20"]
[Round "1"]
[White "Shaw, Robin"]
[Black "Barry, David"]
[Result "0-1"]
[WhiteElo "1791"]
[BlackElo "1480"]

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 Be7 6.Bc4 d6 7.O-O Nf6 8.Qe2 O-O 9.Rd1 Qc7 10.Bf4 a6 11.e5 Nh5 12.exd6 Nxf4 13.dxc7 Nxe2+ 14.Bxe2 Nc6 15.Na4 b5 16.Rac1 bxa4 17.Rxc6 Ra7 18.Rc4 Rb7 19.Rd2 Bf6 20.Rcc2 g5 21.h3 Ra7 22.Rc5 h6 23.g4 Rb7 24.Bxa6 Rxb2 25.Rxb2 Bxb2 26.Bxc8 Rxc8 27.Rb5 Rxc7 28.Rxb2 Rc3 29.Kg2 a3 30.Rb3 Rxb3 31.Nd2 Rb2 32.Nc4 Rxa2 0-1

Lol, what a lucky escape :). Every Legal move on the board on move 30 other Rb3 or Rc2 was winning for white

Kevin Bonham
23-05-2018, 08:36 PM
I'm amazed that such a strong tournament has only one former State Champion in it!

I tried to get the same pairing as above with Lakner downfloated via various mucking about with different versions of Vega (6 through 8) and different tournament options but couldn't do it. The best I could get was to match the top 3 boards and even then I had to change the pairing system between rounds 1 and 2 (which the new version doesn't seem to even allow.) One trap in earlier versions is using Swiss Vega pairings rather than FIDE Dutch but even that doesn't do it.

Capablanca-Fan
24-05-2018, 01:57 AM
I won my round one game. :eek: It's my biggest win by almost 300 points, and that it came from a gross blunder in the endgame when I was totally lost, doesn't stop me enjoying it. :lol:

[Event "WA Championship 2018"]
[Date "2018.05.20"]
[Round "1"]
[White "Shaw, Robin"]
[Black "Barry, David"]
[Result "0-1"]
[WhiteElo "1791"]
[BlackElo "1480"]

1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3 e6 5.Nf3 Be7 6.Bc4 d6 7.O-O Nf6 8.Qe2 O-O 9.Rd1 Qc7 10.Bf4 a6 11.e5 Nh5 12.exd6 Nxf4 13.dxc7 Nxe2+ 14.Bxe2 Nc6 15.Na4 b5 16.Rac1 bxa4 17.Rxc6 Ra7 18.Rc4 Rb7 19.Rd2 Bf6 20.Rcc2 g5 21.h3 Ra7 22.Rc5 h6 23.g4 Rb7 24.Bxa6 Rxb2 25.Rxb2 Bxb2 26.Bxc8 Rxc8 27.Rb5 Rxc7 28.Rxb2 Rc3 29.Kg2 a3 30.Rb3 Rxb3 31.Nd2 Rb2 32.Nc4 Rxa2 0-1

Well done, and glad you enjoyed it.

I don't know what he was thinking with 30. Rb3. He could have played 30. Rb8+ Kg7 31. Ra8, following the common rule that Rs should be attacking rather than defending. Then he can bring his N to win the Pa3. Another idea was 30. Re2 followed by Re3. Black needs to retreat his R to defending on the a file, otherwise an exchange will be forced on bad terms for Black, unlike the game. This is also a common technique when a piece ahead: aiming for squares that attack a key enemy P, such as e3, which forces the opponent either to exchange or cede key lines.

MichaelBaron
25-05-2018, 02:52 AM
I've just done the same. Vega produces my manual pairings for Round 2.



Yes, this sounds like Norbert. It is his standard response to everything.

Norbert, as arbiter, should be expected to explain the reasoning behind the pairings.

I'll email my worked pairings to Norbert and the participants when I have time, probably tonight.

If Norbert doesn't change the pairings, then he can suffer the consequences.

It is amazing that an arbiter can pair ''as he pleases'' without having to explain the pairing method/system used

Andrew Hardegen
25-05-2018, 05:27 PM
Norbert has emailed players to explain that the problem was that he was using a 3 year old version of Vega (i.e. 7.1.6). He will install Vega 8 and hopefully, if the tournament is then configured correctly, that will fix the problem. He has announced that the Round 2 pairings will be published on the CAWA website by midday Saturday. I have no idea why it should take that long.

I suspect the old version by itself was NOT the problem. Round 2 pairing is a very simple process, and both the old and the new JaVaFo pairing engines should produce the same Round 2 pairings. I have asserted all along that Norbert just hadn't configured the tournament properly, and I will continue to assert this.

Only a truly inept arbiter would run a 3 year old version of any pairing software without first checking for whether an update is available. Yet Norbert blames me, for my not asking him which version he was using, and not advising him that a newer version was available.

Anyway, I would consider it reasonably safe to assume that the pairings that I have published in an above post will be the actual pairings. If not, I will contest them again.

Here is the report that I sent to CAWA Council and Norbert regarding the pairings, at 8:54pm on Wednesday evening. I can't upload the file, as it is too big. https://www.dropbox.com/s/nt0s1ncrg9hw77m/WA%20Open%20Chess%20Championship%20-%20Pairings%20Round%202.pdf?dl=0

Norbert only responded at 11:52am on Friday, after he had been in contact with Bill Gletsos. One member of the CAWA Council was quick to condemn my query as "unnecessary even if correct and very damaging". Others ignored it entirely. Neither Norbert nor anyone else from the CAWA Council ever addressed the substance of my report.


I emailed Norbert yesterday about Lakner being on board 9, and he said he'd looked at it closely and it was correct. I don't know the mechanics of Swiss pairings though, I just know how to click the 'automatic' button in Vega, so I can't really argue it.

Norbert is full of crap. The revised pairings will show that floating Lakner down to 0.0/1 is incorrect.

Kevin Bonham
25-05-2018, 06:12 PM
It is amazing that an arbiter can pair ''as he pleases'' without having to explain the pairing method/system used

There's no evidence the arbiter has manually paired inappropriately or anything of that kind. As Andrew suggests it looks like a combination of using an old version and setting errors. Possibly multiple setting errors.

Andrew Hardegen
26-05-2018, 03:37 PM
Pairings updated.

3631

Andrew Hardegen
28-05-2018, 12:30 AM
I only know a few of the Round 2 results. I didn't check the results sheet before I left. Maybe David or one of the other players can post them.

I don't know what acceleration if any will be used for Round 3. I asked Gordon Dunlop on 20th May whether he knew what Norbert would be doing regarding acceleration in Round 3. He said that Norbert would generate 2 different sets of pairings: (i) with acceleration removed entirely, and (ii) with acceleration decreased to 0.5 points. Then I think Norbert will choose whichever one he likes the look of best.

Bill Gletsos
28-05-2018, 12:40 AM
I don't know what acceleration if any will be used for Round 3. I asked Gordon Dunlop on 20th May whether he knew what Norbert would be doing regarding acceleration in Round 3. He said that Norbert would generate 2 different sets of pairings: (i) with acceleration removed entirely, and (ii) with acceleration decreased to 0.5 points. Then I think Norbert will choose whichever one he likes the look of best.Prior to the start of the tournament was it announced how many rounds would be accelerated.

pappubahry
28-05-2018, 12:46 AM
I only know a few of the Round 2 results. I didn't check the results sheet before I left. Maybe David or one of the other players can post them.
I almost posted earlier this evening but refrained because I wasn't very sure about the Kelly-Kinsman game. When I last saw the position, Craig was a piece up, but I thought I heard him resign a little later. Either it was a very interesting game or I have the result round the wrong way! With that caveat, I think it went:


1 = Maggs,Derwent ( 1.0) - Kurniawan,Stephanus ( 1.0) = 3 - 1 = 0 - 1
-----------------------------------------------------------------------------------
2 = Gong,Patrick ( 1.0) - Hardegen,Andrew ( 1.0) = 2 - 5 = -
-----------------------------------------------------------------------------------
3 = Kelly,Adam ( 1.0) - Kinsman,Craig C ( 0.5) = 6 - 10 = 1 - 0
-----------------------------------------------------------------------------------
4 = Ferozkohi,Ihsan ( 0.5) - Lakner,Jay ( 0.0) = 4 - 7 = 1 - 0
-----------------------------------------------------------------------------------
5 = Maris,Natalie A ( 1.0) - Maris,Robert ( 0.0) = 16 - 8 = 0 - 1
-----------------------------------------------------------------------------------
6 = Dunlop,Gordon ( 0.0) - Simonds,Marcus ( 1.0) = 11 - 15 = -
-----------------------------------------------------------------------------------
7 = Gale,Brian ( 1.0) - Fu,Yihe (Rebo) ( 0.0) = 18 - 12 = -
-----------------------------------------------------------------------------------
8 = Wolstencroft,Alan ( 1.0) - Hintz,Steven ( 1.0) = 14 - 17 = 1 - 0
-----------------------------------------------------------------------------------
9 = Barry,David ( 1.0) - Milovanovic,Stevica ( 0.0) = 19 - 20 = 1 - 0
-----------------------------------------------------------------------------------
10 = Laugery,Bernard A ( 0.0) - Singh,Gurpreet ( 0.0) = 21 - 24 = 1 - 0
-----------------------------------------------------------------------------------
11 = Gao,Oscar ( 0.0) - Ong,Celine ( 0.0) = 23 - 22 = 1 - 0

Andrew Hardegen
28-05-2018, 01:08 AM
Prior to the start of the tournament was it announced how many rounds would be accelerated.

No it wasn't.

Here is the entry form, which says only "7 round Swiss". 3632

I was present for the announcements at the start of Round 1, and no mention was made about there being any acceleration at all.

The entry form also says, falsely, that the arbiter is a FIDE Arbiter.

Andrew Hardegen
28-05-2018, 01:11 AM
Thanks, pappubahry. I think you are right about Kelly-Kinsman as I recall Adam telling me that he won.

pappubahry
28-05-2018, 09:32 AM
I got a date in the thread title wrong. :doh: The final round is on 1 July, not 1 August.

[fixed - mod]

MichaelBaron
28-05-2018, 06:29 PM
Not sure what is the logic behind acceleration if there are 22 players only :)

antichrist
28-05-2018, 07:24 PM
Not sure what is the logic behind acceleration if there are 22 players only :)

For only 22 entrants computer programming is not necessary either, can be performed manually without any controversy. But maybe Establishment rules direct that it be done electronically.

Kevin Bonham
28-05-2018, 08:54 PM
For only 22 entrants computer programming is not necessary either, can be performed manually without any controversy.

The rules these days are much more complex. Even with 22 entrants you'd probably get it wrong.

Andrew Hardegen
28-05-2018, 10:42 PM
Not sure what is the logic behind acceleration if there are 22 players only :)

I'm not sure either. You could email the arbiter. Though knowing him personally, I can't guarantee that you will get any kind of well-founded answer, or indeed any answer at all.

Andrew Hardegen
28-05-2018, 10:55 PM
No pairings for Round 3 yet.

Andrew Hardegen
29-05-2018, 07:50 PM
And still no Round 3 pairings, 48 hours on from the end of Round 2.

What is Norbert doing?

Andrew Hardegen
30-05-2018, 08:01 PM
Still no Round 3 pairings, 72 hours on from the end of Round 2.

At least the Round 2 results have been uploaded to the CAWA website.

Andrew Hardegen
30-05-2018, 10:39 PM
Round 3 pairings posted below.

The pairings suggest that the acceleration has now been removed completely for Round 3. (Reduction to 0.5 points for Round 3 works better, as discussed following the 2017 Christmas Open. Apparently the lessons have not been learnt.)

Given that the acceleration has indeed been removed entirely, the pairings are consistent with FIDE Dutch pairing rules.

They are just very bad pairings, as a consequence of the acceleration. At the top, seeds 1, 2, 3, 6 get what could be viewed as Round 1 games. Seeds 4 and 5 play each other, and don't get any Round 1 game at all.

3634

Andrew Hardegen
31-05-2018, 12:20 AM
Vega webpages (unofficial -- based on my shadow copy of the tournament): http://southernsuburbschessclub.org.au/Vega2018/www2018%20WA%20Open%20Championship/

MichaelBaron
31-05-2018, 05:21 PM
Round 3 pairings posted below.

The pairings suggest that the acceleration has now been removed completely for Round 3. (Reduction to 0.5 points for Round 3 works better, as discussed following the 2017 Christmas Open. Apparently the lessons have not been learnt.)

Given that the acceleration has indeed been removed entirely, the pairings are consistent with FIDE Dutch pairing rules.

They are just very bad pairings, as a consequence of the acceleration. At the top, seeds 1, 2, 3, 6 get what could be viewed as Round 1 games. Seeds 4 and 5 play each other, and don't get any Round 1 game at all.

3634

Ok, So pairings are to be done at discretion of the arbiter, then the question is...who appoints arbiter for a state Championship? Must be the state association. Surely no arbiters are self-appointed.:doh:

pappubahry
01-06-2018, 11:42 PM
They are just very bad pairings, as a consequence of the acceleration. At the top, seeds 1, 2, 3, 6 get what could be viewed as Round 1 games. Seeds 4 and 5 play each other, and don't get any Round 1 game at all.

(I am moderately confident in the following bit of Vega manipulation, but my earlier effort to predict the two possible draws for round three got the actual draw wrong. Perhaps it was because I created the tournament in version 7.6.4 and then later switched to version 8.0.6, messing about with different Swiss systems in between, I don't know. In my current version of the tournament, re-created from scratch tonight in 8.0.6, boards 7 and 8 in round two have been swapped, i.e., the same games are played but the board labels are different.)

My attempt at seeing what would happen with half-point acceleration gives:

Hypothetical pairings with 0.5-point acceleration

1 = Kurniawan,Stephanus ( 2.0) - Kelly,Adam ( 2.0) = 1 - 6 = ...
-----------------------------------------------------------------------------------
2 = Barry,David ( 2.0) - Gong,Patrick ( 1.5) = 19 - 2 = ...
-----------------------------------------------------------------------------------
3 = Hardegen,Andrew ( 1.5) - Ferozkohi,Ihsan ( 1.5) = 5 - 4 = ...
-----------------------------------------------------------------------------------
4 = Simonds,Marcus ( 1.5) - Wolstencroft,Alan ( 2.0) = 15 - 14 = ...
-----------------------------------------------------------------------------------
5 = Maris,Robert ( 1.0) - Gale,Brian ( 1.5) = 8 - 18 = ...
-----------------------------------------------------------------------------------
6 = Maris,Natalie A ( 1.0) - Maggs,Derwent ( 1.0) = 16 - 3 = ...
-----------------------------------------------------------------------------------
7 = Kinsman,Craig C ( 0.5) - Laugery,Bernard A ( 1.0) = 10 - 21 = ...
-----------------------------------------------------------------------------------
8 = Hintz,Steven ( 1.0) - Dunlop,Gordon ( 0.5) = 17 - 11 = ...
-----------------------------------------------------------------------------------
9 = Fu,Yihe (Rebo) ( 0.5) - Gao,Oscar ( 1.0) = 12 - 23 = ...
-----------------------------------------------------------------------------------
10 = Lakner,Jay ( 0.0) - Ong,Celine ( 0.0) = 7 - 22 = ...
-----------------------------------------------------------------------------------
11 = Milovanovic,Stevica ( 0.0) - Singh,Gurpreet ( 0.0) = 20 - 24 = ...
This is sort of like an inverse to the actual pairings, with seeds 2 and 3 getting "round one games" and 1, 4, 5, 6 getting tough games. The 3rd seed getting an easy game looks to me like a Swiss draw functioning as expected, since he's on the lowest score of the top six. With two bottom-halfers (Alan and I) on 2/2, someone near the top on a (real) score of 1.5/2 was likely to play a bottom-halfer, and it happened to be me v Patrick. Whether such a draw would be more or less fair than the actual draw, I don't have any intuition for!

Of note is that both Alan and I got our 2/2 scores by playing fellow bottom-halfers in both the first two rounds, which feels slightly anomalous -- Kathryn's withdrawal leaving an odd number of accelerated players perhaps made this more likely.

There's a lot more that I'd like to investigate on this topic, but I think I'd rather study chess than learn how to simulate Swiss tournaments (I'm wondering about a full-point acceleration for round three, half-point for round four). Maybe I'll return to the topic in July, when I won't be playing three classical games a week. For now my tentative conclusions are:

- Probably don't use acceleration for the state championship, especially given how small the field is.
- I still like the rhythm of an accelerated draw as a coddled bottom-halfer, so I think it's fine to have some weekenders use acceleration.

Andrew Hardegen
02-06-2018, 12:24 AM
(I am moderately confident in the following bit of Vega manipulation, but my earlier effort to predict the two possible draws for round three got the actual draw wrong. Perhaps it was because I created the tournament in version 7.6.4 and then later switched to version 8.0.6, messing about with different Swiss systems in between, I don't know. In my current version of the tournament, re-created from scratch tonight in 8.0.6, boards 7 and 8 in round two have been swapped, i.e., the same games are played but the board labels are different.)

Bill told me that he was aware of a bug relating to accelerated pairing assignment that was fixed very recently. If I recall correctly Bill also observed the same incorrect board order that you describe when generating the Round 2 pairings using an older version. I'm not sure if this incorrect order is caused by the bug that was identified or by a different bug, but the order produced by the newer 8.0.12 is fine.

pappubahry
02-06-2018, 12:37 AM
Thanks Andrew. It looks like the free Linux download that I use is a few versions behind the Windows one.

Bill Gletsos
02-06-2018, 06:24 PM
Bill told me that he was aware of a bug relating to accelerated pairing assignment that was fixed very recently. If I recall correctly Bill also observed the same incorrect board order that you describe when generating the Round 2 pairings using an older version. I'm not sure if this incorrect order is caused by the bug that was identified or by a different bug, but the order produced by the newer 8.0.12 is fine.There was nothing wrong with the pairings it was just the with the board order.

pappubahry
03-06-2018, 08:01 PM
Round three results:


1 = Kurniawan,Stephanus ( 2.0) - Wolstencroft,Alan ( 2.0) = 1 - 14 = 1 - 0
-----------------------------------------------------------------------------------
2 = Barry,David ( 2.0) - Kelly,Adam ( 2.0) = 19 - 6 = 0 - 1
-----------------------------------------------------------------------------------
3 = Simonds,Marcus ( 1.5) - Gong,Patrick ( 1.5) = 15 - 2 = 0 - 1
-----------------------------------------------------------------------------------
4 = Hardegen,Andrew ( 1.5) - Ferozkohi,Ihsan ( 1.5) = 5 - 4 = 1 - 0
-----------------------------------------------------------------------------------
5 = Gale,Brian ( 1.5) - Maggs,Derwent ( 1.0) = 18 - 3 = 0 - 1
-----------------------------------------------------------------------------------
6 = Maris,Robert ( 1.0) - Laugery,Bernard A ( 1.0) = 8 - 21 = 1 - 0
-----------------------------------------------------------------------------------
7 = Hintz,Steven ( 1.0) - Maris,Natalie A ( 1.0) = 17 - 16 = 0 - 1
-----------------------------------------------------------------------------------
8 = Fu,Yihe (Rebo) ( 0.5) - Gao,Oscar ( 1.0) = 12 - 23 = 1 - 0
-----------------------------------------------------------------------------------
9 = Kinsman,Craig C ( 0.5) - Dunlop,Gordon ( 0.5) = 10 - 11 = -
-----------------------------------------------------------------------------------
10 = Lakner,Jay ( 0.0) - Ong,Celine ( 0.0) = 7 - 22 = 1 - 0
-----------------------------------------------------------------------------------
11 = Milovanovic,Stevica ( 0.0) - Singh,Gurpreet ( 0.0) = 20 - 24 = 1 - 0

pappubahry
03-06-2018, 09:15 PM
[Event "WA Championship 2018"]
[Date "2018.06.03"]
[Round "3"]
[White "Barry, David"]
[Black "Kelly, Adam"]
[Result "0-1"]
[WhiteElo "1480"]
[BlackElo "2104"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.a4 b4 9.d3 d6 10.Nbd2 Na5 11.Ba2 c5 12.c3 Rb8 13.cxb4 Rxb4 14.h3 Bd7 15.Bc4 Qc8 16.b3 Rb8 17.Ba3 Nc6 18.Nf1 Bd8 19.Ne3 Ba5 20.Re2 Bc3 21.Bb2 Bd4 22.Bxd4 cxd4 23.Nd5 Nxd5 24.Bxd5 Ne7 25.Rc2 Qd8 26.Bc4 a5 27.Rb1 Ng6 28.Rcb2 Rb4 29.Qd2 Nf4 30.Kh2 Qf6 31.Ng1 Qg6 32.f3 Kh8 33.Rc1 f5 34.g3 Nh5 35.Qg2 fxe4 36.fxe4 Rbb8 37.Rf2 Nf6 38.Rcf1 Qh6 39.Kh1 Rfd8 40.Rxf6 {And here I collapsed in time trouble, not having found a way to stop Black's knight going to g4 and e3. Simply} [40.Qh2] {is easiest; I'd seen and rejected} [40.Qf3 Bxh3 having missed 41.Rh2!] 40...gxf6 41.Kh2 Rf8 42.Nf3 f5 43.exf5 Rxf5 44.Nh4 Rxf1 45.Qxf1 Rf8 46.Qe2 Bc6 47.Qg4 Qd2+ 0-1

MichaelBaron
03-06-2018, 11:17 PM
[Event "WA Championship 2018"]
[Date "2018.06.03"]
[Round "3"]
[White "Barry, David"]
[Black "Kelly, Adam"]
[Result "0-1"]
[WhiteElo "1480"]
[BlackElo "2104"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.a4 b4 9.d3 d6 10.Nbd2 Na5 11.Ba2 c5 12.c3 Rb8 13.cxb4 Rxb4 14.h3 Bd7 15.Bc4 Qc8 16.b3 Rb8 17.Ba3 Nc6 18.Nf1 Bd8 19.Ne3 Ba5 20.Re2 Bc3 21.Bb2 Bd4 22.Bxd4 cxd4 23.Nd5 Nxd5 24.Bxd5 Ne7 25.Rc2 Qd8 26.Bc4 a5 27.Rb1 Ng6 28.Rcb2 Rb4 29.Qd2 Nf4 30.Kh2 Qf6 31.Ng1 Qg6 32.f3 Kh8 33.Rc1 f5 34.g3 Nh5 35.Qg2 fxe4 36.fxe4 Rbb8 37.Rf2 Nf6 38.Rcf1 Qh6 39.Kh1 Rfd8 40.Rxf6 {And here I collapsed in time trouble, not having found a way to stop Black's knight going to g4 and e3. Simply} [40.Qh2] {is easiest; I'd seen and rejected} [40.Qf3 Bxh3 having missed 41.Rh2!] 40...gxf6 41.Kh2 Rf8 42.Nf3 f5 43.exf5 Rxf5 44.Nh4 Rxf1 45.Qxf1 Rf8 46.Qe2 Bc6 47.Qg4 Qd2+ 0-1

Given the rating difference, you put up an amazing fight!

Andrew Hardegen
03-06-2018, 11:36 PM
Unofficial crosstable after Round 3:


2018 WA Open Championship
Cross Table at round 3 sorted by score

Pos NAME Rtg T Fed Pts | 1 2 3 | Buc1 BucT S-B
-----------------------------------------------------------------------------------------
1 Kurniawan,Stephanus 2369 WA 3.0 | +W15 +B6 +W7 | 3.5 4.5 4.50
2 Kelly,Adam 2104 CM WA 3.0 | +B10 +W14 +B8 | 3.5 4.5 4.50
3 Gong,Patrick 2352 FM WA 2.5 | +B5 =W4 +B12 | 4.5 6.0 4.75
4 Hardegen,Andrew 2131 WA 2.5 | +W16 =B3 +W11 | 4.0 5.0 3.75
5 Maris,Robert 1987 WA 2.0 | -W3 +B9 +W19 | 4.5 5.5 3.00
6 Maggs,Derwent 2257 WA 2.0 | +BYE -W1 +B13 | 4.5 5.5 2.50
7 Wolstencroft,Alan 1753 WA 2.0 | +B18 +W17 -B1 | 4.0 5.0 2.00
8 Barry,David 1480 WA 2.0 | +B22 +W18 -W2 | 4.0 5.0 2.00
9 Maris,Natalie A 1679 WA 2.0 | +B23 -W5 +B17 | 3.0 3.0 1.00
10 Fu,Yihe (Rebo) 1892 WA 1.5 | -W2 =B13 +W20 | 4.5 5.5 1.75
11 Ferozkohi,Ihsan 2238 WA 1.5 | =B14 +W15 -B4 | 3.5 4.5 1.50
12 Simonds,Marcus 1725 WA 1.5 | +W19 =B16 -W3 | 3.5 4.5 1.50
13 Gale,Brian 1502 WA 1.5 | +B24 =W10 -W6 | 3.0 3.0 0.75
14 Kinsman,Craig C 1961 WA 1.0 | =W11 -B2 =W16 | 4.5 5.5 1.25
15 Lakner,Jay 2098 WA 1.0 | -B1 -B11 +W23 | 4.5 4.5 0.00
16 Dunlop,Gordon 1895 WA 1.0 | -B4 =W12 =B14 | 4.0 5.0 1.25
17 Hintz,Steven 1592 WA 1.0 | +W20 -B7 -W9 | 4.0 5.0 1.00
18 Milovanovic,Stevica 1208 WA 1.0 | -W7 -B8 +W24 | 4.0 4.0 0.00
19 Laugery,Bernard A 1126 WA 1.0 | -B12 +W24 -B5 | 3.5 3.5 0.00
20 Gao,Oscar 763 WA 1.0 | -B17 +W23 -B10 | 2.5 2.5 0.00
21 Hardegen,Kathryn 1983 WFM WA 0.0 | -BYE -- -- | 3.5 4.5 0.00
22 Shaw,Robin A 1791 WA 0.0 | -W8 -- -- | 3.5 4.5 0.00
23 Ong,Celine 851 WA 0.0 | -W9 -B20 -B15 | 3.0 4.0 0.00
24 Singh,Gurpreet 0 WA 0.0 | -W13 -B19 -B18 | 2.5 3.5 0.00

Generated by Vega - www.vegachess.com

pappubahry
06-06-2018, 01:17 PM
(Mods, feel free to move this post to an appropriate thread if desired.)


I am moderately confident in the following bit of Vega manipulation
My hypothetical pairings were a little wrong. If you manually change the number of virtual points to assign in the acceleration (here, from 1 point initially to 0.5 in round three), Vega "thinks" that there has been a 0.5-point acceleration applied from round one. In particular, the trfx file -- which at its core is a cross table and a table of virtual points for acceleration -- has all 0.5's in the "XXA" lines defining the previous accelerations applied.

I think that under the hood, Vega is calling the bbpPairings engine, which takes as input the trfx file. The engine infers players' float histories from the cross table and virtual points, and since the virtual points are wrong, its inferred float histories can be wrong, leading to potentially incorrect pairings for the subsequent round(s).

I don't see a way within Vega of manually changing the number of acceleration points to apply without causing errors of this form (you can get 1-1-1-0.5-0.5 correctly with the Baku setting). I tried manually changing the trfx file but Vega reverted my changes before calculating the next set of pairings.

Most of my tests were in 8.0.6 Linux, but I did a quick test in 8.0.12 Windows today and it shows the same behaviour.


I think I'd rather study chess than learn how to simulate Swiss tournaments
This was also wrong.

Andrew Hardegen
06-06-2018, 02:01 PM
(Mods, feel free to move this post to an appropriate thread if desired.)


My hypothetical pairings were a little wrong. If you manually change the number of virtual points to assign in the acceleration (here, from 1 point initially to 0.5 in round three), Vega "thinks" that there has been a 0.5-point acceleration applied from round one. In particular, the trfx file -- which at its core is a cross table and a table of virtual points for acceleration -- has all 0.5's in the "XXA" lines defining the previous accelerations applied.

I think that under the hood, Vega is calling the bbpPairings engine, which takes as input the trfx file. The engine infers players' float histories from the cross table and virtual points, and since the virtual points are wrong, its inferred float histories can be wrong, leading to potentially incorrect pairings for the subsequent round(s).

I don't see a way within Vega of manually changing the number of acceleration points to apply without causing errors of this form (you can get 1-1-1-0.5-0.5 correctly with the Baku setting). I tried manually changing the trfx file but Vega reverted my changes before calculating the next set of pairings.

Most of my tests were in 8.0.6 Linux, but I did a quick test in 8.0.12 Windows today and it shows the same behaviour.
.

I identified the same problem. The custom acceleration setup assumes that the acceleration is uniform for a fixed number of rounds. So, changing "Accelerated Points" to 0.5 for Round 3 will induce false floats in Round 2 (as players will be assumed only to have had 0.5 fictitious points in Round 2 as well), and these false floats change the Round 3 (EDIT: and Round 4 -- copied the above passage from an email I wrote prior to Round 3!) pairings. I am also using Vega 8.0.12.

This particular decreasing acceleration method must be performed manually.

I did a manual pairing with 0.5 point acceleration for Round 3. I get 1-6, 19-2, 5-4, 8-14, 15-3, 11-18, 10-21, 12-23, 17-16, 7-13, 20-22, 24-BYE.

Bill Gletsos
06-06-2018, 05:01 PM
I think that under the hood, Vega is calling the bbpPairings engine, which takes as input the trfx file.That isn't correct.
Vega uses the JaVaFo engine for Dutch pairings.
Only Swiss Burstein uses the bbpPairing engine.

Andrew Hardegen
06-06-2018, 05:15 PM
There is a rumour floating around that the published Round 4 pairings are wrong.

The published pairings are as follows:

3637

The pairings should instead be:

1. Kelly - Kurniawan
2. Gong - Barry
3. Wolstencroft - A Hardegen
4. Maggs - R Maris
5. N Maris - Simonds
6. Ferozkohi - Gale
7. Dunlop - Fu
8. Lakner - Milovanovic
9. Gao - Kinsman
10. Singh - Hintz
11. Ong - Laugery

Here is my manual pairing, which my shadow file (using Vega 8.0.12) confirms:

https://www.dropbox.com/s/s3pha42vzeiwlud/WA%20Open%20Chess%20Championship%20-%20Pairings%20Round%204.pdf?dl=0

Kevin Bonham
06-06-2018, 10:09 PM
The pairings should instead be:

1. Kelly - Kurniawan
2. Gong - Barry
3. Wolstencroft - A Hardegen
4. Maggs - R Maris
5. N Maris - Simonds
6. Ferozkohi - Gale
7. Dunlop - Fu
8. Lakner - Milovanovic
9. Gao - Kinsman
10. Singh - Hintz
11. Ong - Laugery

I get this when using an old copy of version 7 (to be precise 7.5.3) as well.

Andrew Hardegen
07-06-2018, 02:47 PM
The published Round 4 pairings used a different acceleration setup to the Round 2 and Round 3 pairings. Norbert had changed the parameters to 2 point acceleration for the top half for the first 2 rounds. This has now been changed to the more logical 1 point acceleration, and the pairings have been redone.

Thanks to Bill for his work to fix this.

The new Round 4 pairings are as I indicated above:

1. Kelly - Kurniawan
2. Gong - Barry
3. Wolstencroft - A Hardegen
4. Maggs - R Maris
5. N Maris - Simonds
6. Ferozkohi - Gale
7. Dunlop - Fu
8. Lakner - Milovanovic
9. Gao - Kinsman
10. Singh - Hintz
11. Ong - Laugery

Bill Gletsos
07-06-2018, 02:51 PM
The new Round 4 pairings are as I indicated above:

1. Kelly - Kurniawan
2. Gong - Barry
3. Wolstencroft - A Hardegen
4. Maggs - R Maris
5. N Maris - Simonds
6. Ferozkohi - Gale
7. Dunlop - Fu
8. Lakner - Milovanovic
9. Gao - Kinsman
10. Singh - Hintz
11. Ong - LaugeryI think this is premature as I'm still seeing the original pairings showing on the CAWA website.

Andrew Hardegen
07-06-2018, 02:53 PM
I think this is premature as I'm still seeing the original pairings showing on the CAWA website.

I've seen an email from Norbert to Mike with these pairings, asking him to update the website.

pappubahry
10-06-2018, 07:54 PM
Round four results:


1 = Kelly,Adam ( 3.0) - Kurniawan,Stephanus ( 3.0) = 6 - 1 = 0 - 1
-----------------------------------------------------------------------------------
2 = Gong,Patrick ( 2.5) - Barry,David ( 2.0) = 2 - 19 = 1 - 0
-----------------------------------------------------------------------------------
3 = Wolstencroft,Alan ( 2.0) - Hardegen,Andrew ( 2.5) = 14 - 5 = 0 - 1
-----------------------------------------------------------------------------------
4 = Maggs,Derwent ( 2.0) - Maris,Robert ( 2.0) = 3 - 8 = 0 - 1
-----------------------------------------------------------------------------------
5 = Maris,Natalie A ( 2.0) - Simonds,Marcus ( 1.5) = 16 - 15 = -
-----------------------------------------------------------------------------------
6 = Ferozkohi,Ihsan ( 1.5) - Gale,Brian ( 1.5) = 4 - 18 = 1 - 0
-----------------------------------------------------------------------------------
7 = Dunlop,Gordon ( 1.0) - Fu,Yihe (Rebo) ( 1.5) = 11 - 12 = 0 - 1
-----------------------------------------------------------------------------------
8 = Lakner,Jay ( 1.0) - Milovanovic,Stevica ( 1.0) = 7 - 20 = 1 - 0
-----------------------------------------------------------------------------------
9 = Gao,Oscar ( 1.0) - Kinsman,Craig C ( 1.0) = 23 - 10 = 0 - 1
-----------------------------------------------------------------------------------
10 = Singh,Gurpreet ( 0.0) - Hintz,Steven ( 1.0) = 24 - 17 = 0F-1F
-----------------------------------------------------------------------------------
11 = Ong,Celine ( 0.0) - Laugery,Bernard A ( 1.0) = 22 - 21 = -

Andrew Hardegen
11-06-2018, 12:26 AM
The unofficial crosstable after Round 4 can be viewed at http://southernsuburbschessclub.org.au/Vega2018/www2018%20WA%20Open%20Championship/crosstablescore.html

pappubahry
17-06-2018, 08:31 PM
Round five:


1 = Kurniawan,Stephanus ( 4.0) - Gong,Patrick ( 3.5) = 1 - 2 = -
-----------------------------------------------------------------------------------
2 = Hardegen,Andrew ( 3.5) - Kelly,Adam ( 3.0) = 5 - 6 = 1 - 0
-----------------------------------------------------------------------------------
3 = Maris,Robert ( 3.0) - Ferozkohi,Ihsan ( 2.5) = 8 - 4 = 0 - 1
-----------------------------------------------------------------------------------
4 = Fu,Yihe (Rebo) ( 2.5) - Maris,Natalie A ( 2.5) = 12 - 16 = 1 - 0
-----------------------------------------------------------------------------------
5 = Simonds,Marcus ( 2.0) - Maggs,Derwent ( 2.0) = 15 - 3 = 0 - 1
-----------------------------------------------------------------------------------
6 = Barry,David ( 2.0) - Lakner,Jay ( 2.0) = 19 - 7 = 0 - 1
-----------------------------------------------------------------------------------
7 = Kinsman,Craig C ( 2.0) - Hintz,Steven ( 2.0) = 10 - 17 = 1 - 0
-----------------------------------------------------------------------------------
8 = Laugery,Bernard A ( 1.5) - Wolstencroft,Alan ( 2.0) = 21 - 14 = 0 - 1
-----------------------------------------------------------------------------------
9 = Gale,Brian ( 1.5) - Gao,Oscar ( 1.0) = 18 - 23 = 1 - 0
-----------------------------------------------------------------------------------
10 = Milovanovic,Stevica ( 1.0) - Dunlop,Gordon ( 1.0) = 20 - 11 = 1 - 0
-----------------------------------------------------------------------------------
11 = Singh,Gurpreet ( 0.0) - Ong,Celine ( 0.5) = 24 - 22 = 0F-1F
The card on board 11 said "withdrawn".

pappubahry
17-06-2018, 09:27 PM
This loss was mildly shattering.

[Event "WA Championship 2018"]
[Date "2018.06.17"]
[Round "5"]
[White "Barry, David"]
[Black "Lakner, Jay"]
[Result "0-1"]
[WhiteElo "1523"]
[BlackElo "2098"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nf6 7.Nc3 O-O 8.Be2 d6 9.O-O Nd7 10.Qd2 Nc5 11.Rac1 f5 12.exf5 gxf5 13.Nxc6 bxc6 14.Bh6 Bxh6 15.Qxh6 Rf6 16.Qh4 Rb8 17.b3 Qf8 18.f4 e5 19.fxe5 Rh6 20.Qf4 dxe5 21.Qxe5 Bd7 22.Rcd1 Re8 23.Qf4 Bc8 24.Rf3 Rg6 25.Rh3 Ne6 26.Qf2 Ng5 27.Rhd3 Qh6 28.Kh1 Nf7 29.Qxa7 f4 30.Qf2 Bf5 31.Rd4 Bg4 32.Bxg4 Rxg4 33.Ne2 Rh4 34.h3 Rxh3+ 35.gxh3 Qxh3+ 36.Kg1 Qg4+ 37.Qg2 Qxg2+ 38.Kxg2 Rxe2+ 39.Kf3 Rxa2 40.Rg1+ Kf8 41.Rxf4 Rb2 42.Kg4 Rxb3 43.Rf6 Ke7 44.Rf4 {Funnily enough I could have actually taken on c6 here as originally intended and still drawn.} Re3 45.Ra1 Ne5+ 46.Kf5 Kd6 47.c5+ Kd5 48.Rh1 Nd3 49.Rfh4 Kxc5 50.Rxh7 Kc4 51.R1h3 Re5+ 52.Kf6 Rd5 53.R7h4+ Kc3 54.Ke6 Ra5 55.Kd6 c5 56.Rh5 Ra6+ 57.Kd5 c4 58.Rg5 Ra5+ 59.Ke4 Rxg5 0-1
Afterwards Jay said he was surprised I didn't sac the rook for the pawn; I was looking to exchange down into a draw, but for some reason KRN v KR didn't occur to me.

Andrew Hardegen
17-06-2018, 09:53 PM
Unofficial crosstable after Round 5:


2018 WA Open Championship
Cross Table at round 5 sorted by score

Pos NAME Rtg T Fed Pts | 1 2 3 4 5 | Buc1 BucT S-B
-----------------------------------------------------------------------------------------------------
1 Hardegen,Andrew 2131 WA 4.5 | +W20 =B3 +W4 +B8 +W6 | 13.5 14.5 12.50
2 Kurniawan,Stephanus 2369 WA 4.5 | +W10 +B9 +W8 +B6 =W3 | 13.0 15.5 13.50
3 Gong,Patrick 2352 FM WA 4.0 | +B7 =W1 +B15 +W14 =B2 | 14.0 16.0 11.50
4 Ferozkohi,Ihsan 2238 WA 3.5 | =B11 +W10 -B1 +W12 +B7 | 13.5 16.0 10.00
5 Fu,Yihe (Rebo) 1892 WA 3.5 | -W6 =B12 +W21 +B20 +W13 | 9.0 10.0 5.75
6 Kelly,Adam 2104 CM WA 3.0 | +B5 +W11 +B14 -W2 -B1 | 15.5 17.5 8.50
7 Maris,Robert 1987 WA 3.0 | -W3 +B13 +W18 +B9 -W4 | 12.5 14.0 6.50
8 Wolstencroft,Alan 1753 WA 3.0 | +B17 +W16 -B2 -W1 +B18 | 12.5 14.0 5.00
9 Maggs,Derwent 2257 WA 3.0 | +BYE -W2 +B12 -W7 +B15 | 12.0 14.0 6.50
10 Lakner,Jay 2098 WA 3.0 | -B2 -B4 +W19 +W17 +B14 | 12.0 13.0 5.00
11 Kinsman,Craig C 1961 WA 3.0 | =W4 -B6 =W20 +B21 +W16 | 9.0 10.0 4.75
12 Gale,Brian 1502 WA 2.5 | +B24 =W5 -W9 -B4 +W21 | 10.5 11.5 3.75
13 Maris,Natalie A 1679 WA 2.5 | +B19 -W7 +B16 =W15 -B5 | 10.0 11.0 3.50
14 Barry,David 1480 WA 2.0 | +B23 +W17 -W6 -B3 -W10 | 12.0 14.0 4.00
15 Simonds,Marcus 1725 WA 2.0 | +W18 =B20 -W3 =B13 -W9 | 10.5 11.5 3.25
16 Hintz,Steven 1592 WA 2.0 | +W21 -B8 -W13 +BYE -B11 | 10.0 11.0 2.50
17 Milovanovic,Stevica 1208 WA 2.0 | -W8 -B14 +W24 -B10 +W20 | 9.0 10.0 2.00
18 Laugery,Bernard A 1126 WA 1.5 | -B15 +W24 -B7 =B19 -W8 | 9.0 10.0 1.50
19 Ong,Celine 851 WA 1.5 | -W13 -B21 -B10 =W18 +BYE | 8.0 8.5 1.25
20 Dunlop,Gordon 1895 WA 1.0 | -B1 =W15 =B11 -W5 -B17 | 13.0 15.0 2.50
21 Gao,Oscar 763 WA 1.0 | -B16 +W19 -B5 -W11 -B12 | 10.5 11.5 1.00
22 Hardegen,Kathryn 1983 WFM WA 0.0 | -BYE -- -- -- -- | 9.0 10.0 0.00
23 Shaw,Robin A 1791 WA 0.0 | -W14 -- -- -- -- | 8.0 9.0 0.00
24 Singh,Gurpreet 0 WA 0.0 | -W12 -B18 -B17 -BYE -BYE | 7.5 8.5 0.00

Generated by Vega - www.vegachess.com

pappubahry
24-06-2018, 08:13 PM
Round six: a win to Stephanus Kurniawan on board 1 takes him to 5.5/6, half a point clear of Patrick Gong going into the final round.


1 = Hardegen,Andrew ( 4.5) - Kurniawan,Stephanus ( 4.5) = 5 - 1 = 0 - 1
-----------------------------------------------------------------------------------
2 = Gong,Patrick ( 4.0) - Fu,Yihe (Rebo) ( 3.5) = 2 - 12 = 1 - 0
-----------------------------------------------------------------------------------
3 = Ferozkohi,Ihsan ( 3.5) - Maggs,Derwent ( 3.0) = 4 - 3 = 1 - 0
-----------------------------------------------------------------------------------
4 = Kelly,Adam ( 3.0) - Maris,Robert ( 3.0) = 6 - 8 = -
-----------------------------------------------------------------------------------
5 = Wolstencroft,Alan ( 3.0) - Kinsman,Craig C ( 3.0) = 14 - 10 = 0 - 1
-----------------------------------------------------------------------------------
6 = Lakner,Jay ( 3.0) - Gale,Brian ( 2.5) = 7 - 18 = 1 - 0
-----------------------------------------------------------------------------------
7 = Maris,Natalie A ( 2.5) - Milovanovic,Stevica ( 2.0) = 16 - 20 = 1 - 0
-----------------------------------------------------------------------------------
8 = Hintz,Steven ( 2.0) - Simonds,Marcus ( 2.0) = 17 - 15 = 0 - 1
-----------------------------------------------------------------------------------
9 = Laugery,Bernard A ( 1.5) - Barry,David ( 2.0) = 21 - 19 = 0 - 1
-----------------------------------------------------------------------------------
10 = Dunlop,Gordon ( 1.0) - Ong,Celine ( 1.5) = 11 - 22 = 1 - 0
-----------------------------------------------------------------------------------
11 = Gao,Oscar ( 1.0) - ( bye ) ( 0.0) = 23 - 0 = 1

Andrew Hardegen
24-06-2018, 09:12 PM
Unofficial crosstable after Round 6:


2018 WA Open Championship
Cross Table at round 6 sorted by score

Pos NAME Rtg T Fed Pts | 1 2 3 4 5 6 | Buc1 BucT S-B
-----------------------------------------------------------------------------------------------------------
1 Kurniawan,Stephanus 2369 WA 5.5 | +W5 +B11 +W12 +B7 =W2 +B3 | 20.0 22.5 20.00
2 Gong,Patrick 2352 FM WA 5.0 | +B8 =W3 +B14 +W13 =B1 +W9 | 20.0 23.0 18.00
3 Hardegen,Andrew 2131 WA 4.5 | +W16 =B2 +W4 +B12 +W7 -W1 | 21.5 23.5 15.50
4 Ferozkohi,Ihsan 2238 WA 4.5 | =B6 +W5 -B3 +W15 +B8 +W11 | 18.5 21.0 14.50
5 Lakner,Jay 2098 WA 4.0 | -B1 -B4 +W21 +W18 +B13 +W15 | 17.5 18.5 8.50
6 Kinsman,Craig C 1961 WA 4.0 | =W4 -B7 =W16 +B19 +W17 +B12 | 14.5 16.0 9.25
7 Kelly,Adam 2104 CM WA 3.5 | +B9 +W6 +B13 -W1 -B3 =W8 | 21.0 24.0 12.25
8 Maris,Robert 1987 WA 3.5 | -W2 +B10 +W20 +B11 -W4 =B7 | 19.0 20.5 9.25
9 Fu,Yihe (Rebo) 1892 WA 3.5 | -W7 =B15 +W19 +B16 +W10 -B2 | 16.5 18.0 8.25
10 Maris,Natalie A 1679 WA 3.5 | +B21 -W8 +B17 =W14 -B9 +W18 | 13.5 14.5 6.00
11 Maggs,Derwent 2257 WA 3.0 | +BYE -W1 +B15 -W8 +B14 -B4 | 19.0 21.5 8.00
12 Wolstencroft,Alan 1753 WA 3.0 | +B18 +W17 -B1 -W3 +B20 -W6 | 17.5 19.0 5.00
13 Barry,David 1480 WA 3.0 | +B23 +W18 -W7 -B2 -W5 +B20 | 17.0 18.5 6.00
14 Simonds,Marcus 1725 WA 3.0 | +W20 =B16 -W2 =B10 -W11 +B17 | 14.5 16.0 5.75
15 Gale,Brian 1502 WA 2.5 | +B24 =W9 -W11 -B4 +W19 -B5 | 16.0 17.5 4.75
16 Dunlop,Gordon 1895 WA 2.0 | -B3 =W14 =B6 -W9 -B18 +W21 | 17.0 18.0 4.50
17 Hintz,Steven 1592 WA 2.0 | +W19 -B12 -W10 +BYE -B6 -W14 | 15.5 17.0 3.50
18 Milovanovic,Stevica 1208 WA 2.0 | -W12 -B13 +W24 -B5 +W16 -B10 | 15.5 17.0 3.50
19 Gao,Oscar 763 WA 2.0 | -B17 +W21 -B9 -W6 -B15 +BYE | 12.5 13.5 2.00
20 Laugery,Bernard A 1126 WA 1.5 | -B14 +W24 -B8 =B21 -W12 -W13 | 14.0 15.0 2.00
21 Ong,Celine 851 WA 1.5 | -W10 -B19 -B5 =W20 +BYE -B16 | 12.5 13.5 1.75
22 Hardegen,Kathryn (W) 1983 WFM WA 0.0 | -BYE -- -- -- -- -- | 12.5 13.5 0.00
23 Shaw,Robin A (W) 1791 WA 0.0 | -W13 -- -- -- -- -- | 12.0 13.0 0.00
24 Singh,Gurpreet (W) 0 WA 0.0 | -W15 -B20 -B18 -BYE -BYE -- | 9.5 10.5 0.00

Generated by Vega - www.vegachess.com

pappubahry
01-07-2018, 08:19 PM
With a score of 6.5/7, Stephanus Kurniawan is the 2018 WA Champion!
2nd: Patrick Gong 6.0
3rd: Andrew Hardegen 5.0

Seniors' Champion: Craig Kinsman 4.5
Reserves Champion (u/1950): Alan Wolstencroft 4.0
Women's Champion: Natalie Maris 3.5
Best junior: Yihe (Rebo) Fu 3.5

I don't know how the FIDE rating calculations shake out, but that must take Stephanus close to 2300.

Round seven results:

1 = Kurniawan,Stephanus ( 5.5) - Ferozkohi,Ihsan ( 4.5) = 1 - 4 = 1 - 0
-----------------------------------------------------------------------------------
2 = Gong,Patrick ( 5.0) - Lakner,Jay ( 4.0) = 2 - 7 = 1 - 0
-----------------------------------------------------------------------------------
3 = Kinsman,Craig C ( 4.0) - Hardegen,Andrew ( 4.5) = 10 - 5 = -
-----------------------------------------------------------------------------------
4 = Maris,Natalie A ( 3.5) - Kelly,Adam ( 3.5) = 16 - 6 = 0 - 1
-----------------------------------------------------------------------------------
5 = Maris,Robert ( 3.5) - Fu,Yihe (Rebo) ( 3.5) = 8 - 12 = 1 - 0
-----------------------------------------------------------------------------------
6 = Maggs,Derwent ( 3.0) - Barry,David ( 3.0) = 3 - 19 = 1 - 0
-----------------------------------------------------------------------------------
7 = Simonds,Marcus ( 3.0) - Wolstencroft,Alan ( 3.0) = 15 - 14 = 0 - 1
-----------------------------------------------------------------------------------
8 = Gale,Brian ( 2.5) - Hintz,Steven ( 2.0) = 18 - 17 = -
-----------------------------------------------------------------------------------
9 = Gao,Oscar ( 2.0) - Dunlop,Gordon ( 2.0) = 23 - 11 = 0 - 1
-----------------------------------------------------------------------------------
10 = Ong,Celine ( 1.5) - Milovanovic,Stevica ( 2.0) = 22 - 20 = 0 - 1
-----------------------------------------------------------------------------------
11 = Laugery,Bernard A ( 1.5) - ( bye ) ( 0.0) = 21 - 0 = 1

Final unofficial cross table:


Pos NAME Rtg T Fed Pts | 1 2 3 4 5 6 7 | Buc1 BucT
---------------------------------------------------------------------------------------------------------
1 Kurniawan,Stephanus 2369 WA 6.5 | +W8 +B9 +W10 +B5 =W2 +B3 +W4 | 28.0 31.5
2 Gong,Patrick 2352 FM WA 6.0 | +B6 =W3 +B14 +W13 =B1 +W11 +W8 | 26.5 29.5
3 Hardegen,Andrew 2131 WA 5.0 | +W15 =B2 +W4 +B10 +W5 -W1 =B7 | 30.0 33.0
4 Ferozkohi,Ihsan 2238 WA 4.5 | =B7 +W8 -B3 +W16 +B6 +W9 -B1 | 28.0 31.0
5 Kelly,Adam 2104 CM WA 4.5 | +B11 +W7 +B13 -W1 -B3 =W6 +B12 | 27.5 30.5
6 Maris,Robert 1987 WA 4.5 | -W2 +B12 +W19 +B9 -W4 =B5 +W11 | 25.5 27.5
7 Kinsman,Craig C 1961 WA 4.5 | =W4 -B5 =W15 +B20 +W18 +B10 =W3 | 23.0 24.5
8 Lakner,Jay 2098 WA 4.0 | -B1 -B4 +W21 +W17 +B13 +W16 -B2 | 26.0 27.0
9 Maggs,Derwent 2257 WA 4.0 | +BYE -W1 +B16 -W6 +B14 -B4 +W13 | 24.5 27.5
10 Wolstencroft,Alan 1753 WA 4.0 | +B17 +W18 -B1 -W3 +B19 -W7 +B14 | 24.0 26.0
11 Fu,Yihe (Rebo) 1892 WA 3.5 | -W5 =B16 +W20 +B15 +W12 -B2 -B6 | 24.5 26.0
12 Maris,Natalie A 1679 WA 3.5 | +B21 -W6 +B18 =W14 -B11 +W17 -W5 | 20.5 21.5
13 Barry,David 1480 WA 3.0 | +B23 +W17 -W5 -B2 -W8 +B19 -B9 | 24.0 26.0
14 Simonds,Marcus 1725 WA 3.0 | +W19 =B15 -W2 =B12 -W9 +B18 -W10 | 22.0 24.0
15 Dunlop,Gordon 1895 WA 3.0 | -B3 =W14 =B7 -W11 -B17 +W21 +B20 | 20.5 21.5
16 Gale,Brian 1502 WA 3.0 | +B24 =W11 -W9 -B4 +W20 -B8 =W18 | 19.5 21.0
17 Milovanovic,Stevica 1208 WA 3.0 | -W10 -B13 +W24 -B8 +W15 -B12 +B21 | 19.5 20.5
18 Hintz,Steven 1592 WA 2.5 | +W20 -B10 -W12 +BYE -B7 -W14 =B16 | 20.5 22.0
19 Laugery,Bernard A 1126 WA 2.5 | -B14 +W24 -B6 =B21 -W10 -W13 +BYE | 18.0 19.0
20 Gao,Oscar 763 WA 2.0 | -B18 +W21 -B11 -W7 -B16 +BYE -W15 | 17.5 18.5
21 Ong,Celine 851 WA 1.5 | -W12 -B20 -B8 =W19 +BYE -B15 -W17 | 17.0 18.5
22 Hardegen,Kathryn (W) 1983 WFM WA 0.0 | -BYE -- -- -- -- -- -- | 16.5 17.5
23 Shaw,Robin A (W) 1791 WA 0.0 | -W13 -- -- -- -- -- -- | 15.5 16.5
24 Singh,Gurpreet (W) 0 WA 0.0 | -W16 -B19 -B17 -BYE -BYE -- -- | 14.0 15.0

Generated by Vega - www.vegachess.com
Linux version)

Andrew Hardegen
01-07-2018, 09:10 PM
With a score of 6.5/7, Stephanus Kurniawan is the 2018 WA Champion!
2nd: Patrick Gong 6.0
3rd: Andrew Hardegen 5.0

Seniors' Champion: Craig Kinsman 4.5
Reserves Champion (u/1950): Alan Wolstencroft 4.0
Women's Champion: Natalie Maris 3.5
Best junior: Yihe (Rebo) Fu 3.5


Congratulations to all!


I don't know how the FIDE rating calculations shake out, but that must take Stephanus close to 2300.

Yes, Stephanus attained an interim FIDE rating of 2303 from his Round 7 win, and has thereby met the rating requirement for the FM title!

pappubahry
01-07-2018, 09:41 PM
I ended my tournament with another "fought hard but lost" game against a strong opponent.

[Event "WA Championship 2018"]
[Date "2018.07.01"]
[Round "7"]
[White "Maggs, Derwent"]
[Black "Barry, David"]
[Result "1-0"]
[WhiteElo "2250"]
[BlackElo "1523"]

1.d4 Nf6 2.Bg5 {This was the third time I'd had Black against Derwent this year, and he correctly guessed that I had come prepared for his usual line against the Benko} d5 3.e3 e6 4.c4 Bb4+ 5.Nc3 c5 6.Bxf6 Qxf6 7.cxd5 exd5 8.Bb5+ Nc6 9.Ne2 O-O 10.dxc5 Rd8 11.Bxc6 Qxc6 12.O-O Bxc5 13.Rc1 Be7 14.Qb3 Qc4 15.Nd4 Qxb3 16.Nxb3 Be6 17.Nd4 Rac8 18.Ncb5 Bc5 19.Rc2 Bxd4 20.Nxd4 Rxc2 21.Nxc2 Rc8 22.Nd4 a6 23.Rd1 Kf8 24.h3 h5 25.f4 g6 26.Kf2 Ke7 27.Rd3 Rc7 28.Rb3 Kd7 [The computer evaluations suggest that 28...b5 is the only move to draw here (or at least White has much better chances with any other move), 29.Ra3 Bc8 I knew that Rb6 looked scary, but I wrongly thought I still had a fortress] 29.Rb6 Ke7 30.Kg3 Kf6 31.a4 Ke7 32.Kh4 Bd7 33.a5 Bc8 34.f5 Bxf5 35.Nxf5+ gxf5 36.Kg5 Ke8 37.Kxf5 Rc2 38.g4 hxg4 39.hxg4 Rf2+ 40.Ke5 Rf3 41.Rb3 d4 42.Kxd4 Rg3 43.Rxb7 Rxg4+ 44.Kd5 Rg6 45.b4 Rg5+ 46.Kd6 Rg6+ 47.Kc5 Re6 48.Rb6 Rxe3 49.Rxa6 Re5+ 50.Kd4 Rh5 51.Rc6 f5 52.a6 Rh7 53.b5 Re7 54.b6 f4 55.a7 1-0

Capablanca-Fan
06-07-2018, 01:20 PM
I can understand why you didn't want to put another P on the same colour of your B with 28... b5. So the problem was 19... Bxd4 exchanging off your good B. With an isolated QP, the most unpleasant minor piece configuration to have is what Black ended up with: a bad B facing a good N. The Rs on the board made it even harder, and just the sort of position where the stronger player can torture a weaker one. Compare this ancient thread Playing against IQPs (http://www.chesschat.org/showthread.php?7089-Playing-against-IQPs).

pappubahry
06-07-2018, 08:03 PM
Thanks C-F, I'll file those old games away to study later. I knew that my bad bishop would be bad, but I thought my rook on the open c-file would prevent him from doing much. Instead White got his rook active by moving it from the d-file to the b-file without stopping in between, and as Derwent pointed out to me in the post-mortem, my rook doesn't do much itself, since White's knight covers c2.

MichaelBaron
07-07-2018, 12:35 AM
Thanks C-F, I'll file those old games away to study later. I knew that my bad bishop would be bad, but I thought my rook on the open c-file would prevent him from doing much. Instead White got his rook active by moving it from the d-file to the b-file without stopping in between, and as Derwent pointed out to me in the post-mortem, my rook doesn't do much itself, since White's knight covers c2.

Great effort, given the rating difference!