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Jesper Norgaard
30-07-2009, 06:34 AM
I was White in the Oaxaca tourney and my opponent had used a lot of time improvising a Sicilian that went wrong from the very first decisions he made. Black has undeveloped or sub-developed Ra8, Rh8, Bc8 and an insecure King's position. It is no wonder White with all forces well developed can already deliver a final blow. Can you find it?

r1b2k1r/2q2pp1/p1pRp3/3nP2p/8/2N3Q1/PPP1B1PP/2K2R2 w - - 0 18
Answers in white text, please.

Igor_Goldenberg
30-07-2009, 10:21 AM
1.Qg5 looks strong enough to me. (threatening Rd8+) If 1...f6 then 2.exf6 gxf6 3.Rxf6+ Nxf6 4.Qxf6+ Kg8 5.Rd8+. If black plays 1...Bd7 or 1...Bb7 then 2.Bxh5 attacking f7 looks strong.

Jesper Norgaard
30-07-2009, 10:57 AM
1.Qg5 looks strong enough to me. (threatening Rd8+) If 1...f6 then 2.exf6 gxf6 3.Rxf6+ Nxf6 4.Qxf6+ Kg8 5.Rd8+. If black plays 1...Bd7 or 1...Bb7 then 2.Bxh5 attacking f7 looks strong.


In fact 1.Qg5 is strong enough to let Black suffer, after 1...Bd7 2.Bxh5 Be8 though still White has a little bit more to prove. I think more than 2 White moves will lead to a winning position here. Anything better?

Igor_Goldenberg
30-07-2009, 11:24 AM
In fact 1.Qg5 is strong enough to let Black suffer, after 1...Bd7 2.Bxh5 Be8 though still White has a little bit more to prove. I think more than 2 White moves will lead to a winning position here. Anything better?
IMO after 3.Rxe6 not much has to be proven. But I'll try to think of your solution

Igor_Goldenberg
30-07-2009, 02:02 PM
I still believe 1.Qg5 is the strongest. Other alternatives are 1.Ne4 (with the idea Ng5) and 1.Qg6, but I prefer 1.Qg5

Jesper Norgaard
30-07-2009, 02:56 PM
I still believe 1.Qg5 is the strongest. Other alternatives are 1.Ne4 (with the idea Ng5) and 1.Qg6, but I prefer 1.Qg5

My box thinks 1.Ne4 is a little bit better than 1.Qg5, but not much - I wouldn't have the faintest idea how it compares those two. After 1.Qg5 Bd7 2.Bxh5 Be8 3.Rxe6 my box continues 3...Nxc3 4.bxc3 Qa7 5.Rd6 Qe7 6.Qf5 g6 7.Bxg6 Rxh2 with some consolidation for Black, around 2.5 to 3 in white advantage. I played 1.Nxd5 (1.Qg6! should be the same essentially, during the game I wanted to avoid 1...Nf6 but White has 2.Rxf6 gxf6 3.Qxf6 with double threat Rd8+ and Qxh8+ which should also give a good advantage) 1...cxd5 2.Qg6! and in this unique position White is certainly threatening 3.Rd8+ (the queen is overworked and must protect f7) or 3.Rxf7+ with equally devastating effect. I thought for a minute during the game that this double threat could be parried somewhat with 2...Ra7 but then 3.Rxf7+,Qxf7 4.Rd8+ Ke7 5.Qg5+ Qf6 6.exf6+ gxf6 7.Qg7+ Kxd8 8.Qxh8+ smashes Black away. Instead my opponent chose the box continuation 2...Bb7 3.Bxh5 and box and opponent bails out with 3...Rxh5 4.Qxh5 Kg8 and of course the game was winning. Box gives +4 to +5 after 2.Qg6.

It is also worth noting that 2.Qg6 Kg8? 3.Rd8+! Qxd8 4.Qxf7+ Kh7 5.Bd3+ Kh6 6.Qg6+ is checkmate, one of the first reasons that made me interested in the move Qg6 (1.Qg6 or 2.Qg6).

Igor_Goldenberg
30-07-2009, 03:09 PM
My box thinks 1.Ne4 is a little bit better than 1.Qg5, but not much - I wouldn't have the faintest idea how it compares those two. After 1.Qg5 Bd7 2.Bxh5 Be8 3.Rxe6 my box continues 3...Nxc3 4.bxc3 Qa7 5.Rd6 Qe7 6.Qf5 g6 7.Bxg6 Rxh2 with some consolidation for Black, around 2.5 to 3 in white advantage. I played 1.Nxd5 (1.Qg6! should be the same essentially, during the game I wanted to avoid 1...Nf6 but White has 2.Rxf6 gxf6 3.Qxf6 with double threat Rd8+ and Qxh8+ which should also give a good advantage) 1...cxd5 2.Qg6! and in this unique position White is certainly threatening 3.Rd8+ (the queen is overworked and must protect f7) or 3.Rxf7+ with equally devastating effect. I thought for a minute during the game that this double threat could be parried somewhat with 2...Ra7 but then 3.Rxf7+,Qxf7 4.Rd8+ Ke7 5.Qg5+ Qf6 6.exf6+ gxf6 7.Qg7+ Kxd8 8.Qxh8+ smashes Black away. Instead my opponent chose the box continuation 2...Bb7 3.Bxh5 and box and opponent bails out with 3...Rxh5 4.Qxh5 Kg8 and of course the game was winning. Box gives +4 to +5 after 2.Qg6.

It is also worth noting that 2.Qg6 Kg8? 3.Rd8+! Qxd8 4.Qxf7+ Kh7 5.Bd3+ Kh6 6.Qg6+ is checkmate, one of the first reasons that made me interested in the move Qg6 (1.Qg6 or 2.Qg6).

So which one does the computer values higher:
1. Nxd5, 1.Qg6, 1.Qg5, 1.Ne4?

Jesper Norgaard
30-07-2009, 03:33 PM
So which one does the computer values higher:
1. Nxd5, 1.Qg6, 1.Qg5, 1.Ne4?

1.Nxd5 gives +4.97
1.Qg6 gives +5.19 but it calculates 1...Bb7 2.Nxd5 cxd5 so it is basically the same.
1.Qg5 gives +2.73
1.Ne4 gives +3.45
This is not letting the beast analyze all night, just half a minute on each move.