PDA

View Full Version : Can the Knight checkmate?



Jesper Norgaard
01-08-2009, 11:19 AM
Here is a nice little position that happened in an OTB game against Abel Davalos in 2003. Abel threatens c1Q+ so White has got to act fast. White moves and wins. Can the White Knight Save the Day?

1r4k1/6P1/1n1pN3/1P1Pp2R/4P1p1/8/2p3P1/6K1 w - - 0 48

Well perhaps you want to have a look at
http://www.xs4all.nl/~timkr/chess2/minor.htm

Saragossa
01-08-2009, 11:32 AM
1.Rh8+ Kf7 2.Rf8+ Ke7 3.g8=N+ Kd7 4. Rf7+ and either move to e8 or c8 gets checkmated.

Jesper Norgaard
01-08-2009, 11:56 AM
1.Rh8+ Kf7 2.Rf8+ Ke7 3.g8=N+ Kd7 4. Rf7+ and either move to e8 or c8 gets checkmated.

Well done Saragossa. The game actually went 4...Ke8 5.Re7+ checkmate.
So in fact the answer is - no the White Knight can't checkmate, he needs a Brother in Arms, a new White Knight to appear on the board, and now in harmonious threesomeness the 2 Knights and Rook can checkmate. Pretty cute isn't it? :P


Actually I have several underpromotions in my games. Once IM Dionisio Aldama checkmated me in one move by underpromoting to a Knight with instant checkmate. It wasn't really necessary as promoting to Queen would win easily, but it would not be mate in one - you have to respect that.

In Oaxaca I made an underpromotion to a Rook because I was really short of time (28 seconds) and couldn't find any of the 2 Black Queens that were at the rim of the board. :wall: It was a check, he moved his King, and then I made another promotion with check, which was a Queen, since I had now found one of the Black Queens ...

73...g1=R+ 74.Kb2 c1=Q+ 0-1

My opponent didn't resign before because he had even less time than me - 20 seconds. Those darn guillotine games!! Of course antichrist would just argue that having an increment would have spoiled all the fun and adrenalin :rolleyes:

Saragossa
01-08-2009, 12:21 PM
[QUOTE=Jesper Norgaard]
Well done Saragossa. The game actually went 4...Ke8 5.Re7+ checkmate.
So in fact the answer is - no the White Knight can't checkmate, he needs a Brother in Arms, a new White Knight to appear on the board, and now in harmonious threesomeness the 2 Knights and Rook can checkmate. Pretty cute isn't it? :P


Yes I've always wondered how awesome it would feel to underpromote properly to win, much cooler than queen sacs and the like I reckon.

Igor_Goldenberg
01-08-2009, 01:32 PM
Nice and neat!

Jesper Norgaard
01-08-2009, 02:15 PM
Yes I've always wondered how awesome it would feel to underpromote properly to win, much cooler than queen sacs and the like I reckon.
Yes it feels pretty cool. But all beauty in Chess is relative - to the beholder.
I just realized that the underpromotion in fact is necessary - for many years I thought it wasn't. If White tries 3.Rxb8 then 3...c1Q+ 4.Kh2 g3+ 5.Kh3 Qh1+ 6.Kg4 Nxd5!! 7.Rf8!! Nf6+!! 8.Rxf6 Kxf6 9.g8Q Qd1+ is actually perpetual check although White can run all the way to a4-b4 but can't force entry to a5 because of (Ka4)Qa1+ and (Kb4)Qe1+. Pretty cool! :clap:

Kevin Bonham
01-08-2009, 03:46 PM
That's awesome. :clap: :clap: :clap:

The only underpromotion I remember having was this really trivial example from a game I was always winning easily:

8/r1P1R1pp/p2k1p2/8/8/8/P4PPP/6K1 w - - 0 1

Here c8Q? loses the rook but white wins easily with queen for rook, however c8N+! saves white's rook and wins black's, so black resigned when I played it. :lol:

Jesper Norgaard
01-08-2009, 04:20 PM
Surely this must be a diagram mistake, White just castled and someone painted the Rook Black?

r6r/p2k4/2pqbp2/B2p2p1/1P1P1Pn1/3B4/P3Q2P/RN3rK1 w - - 0 21

In fact not! Here is the proof, Jose Angel Valdes - Jesper Norgaard 2004:

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Bd3 d5 7. e5 Ng4
8. Qe2 Bc5 9. O-O Qe7 10. Bf4 g5 11. Bg3 h5 12. e6 Bxe6 13. Be5 f6 14. Bxc7
Kd7 15. Ba5 Qd6 16. g3 h4 17. b4 Bd4 18. c3 hxg3 19. cxd4 g2 20. f4 gxf1=R+
21. Qxf1 Nxh2 22. Qg2 Qxf4 23. Qf2 Nf3+ 0-1

Also otherwise an entertaining game, especially the total-football-move 14...Kd7!

Jesper Norgaard
01-08-2009, 04:44 PM
Here Black should promote to queen as the ideal option, except there was no extra queen in his pocket, and all other reserve chess sets in the club were in use. A queen or rook from the own set could not be used (Qd5,Rd8,Re8 are all still in use in the game) so it occurred to me that instead of going hunting for a queen in the club (or ask the arbiter for a black queen) instead a Knight would give the same effect - White must take it! 33...e1=N! 34.Rxe1 the reason is that 34.R xe1 loses only the exchange, while [34.Qf2 Qxg2+ 35.Qxg2 Nxg2 36.Kxg2 Re2+ 37.Kf1 Rxb2] loses a full rook. The finish was short: 34...Rxe1 35.Qd2?? Qe5+ 0-1 since Black answers Rg3 with Re2+

Jesper Norgaard
01-08-2009, 05:04 PM
The last example is tragicomical, not because it was lost by underpromotion to mate, but because there was such an easy draw exchanging pawns with h4, Jesper Norgaard - IM Dionisio Aldama 1996:

88.Re6?? 88.h4!= would be a simple draw 88...Rxh3 89.Re4+?? throwing everything away 89...Kc3 90.Ke1 d2+ 91.Ke2 Rh2+ 92.Ke3 d1=N+ checkmate!