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Subject: Re: An amazing checkmate. Can your program find it?

Author: Dann Corbit

Date: 11:34:48 12/22/99

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On December 22, 1999 at 14:10:56, Dann Corbit wrote:

>Have a look at this tremendous checkmate Chest found from the famous 1924 New
>York Chess Club championship:
>2r3k1/5ppp/7r/Q7/3P1p2/1N3Pnq/PP3K1P/R5R1 b - - acd 10; acn 535351375; acs
>15279; bm Ne4+; ce 32750; dm 9; id "C.A.P. 812153"; pv Ne4+ fxe4 Qe3+ Kf1 Rxh2
>Rxg7+ Kxg7 Qe5+ f6 Qe7+ Kg6 Qxf6+ Kxf6 e5+ Kg6 e6 Qf2#;
>
>I will be amazed if any general purpose program (or even most GM's) can find it.

Black (none other than the legendary Frank Marshall), who had a sure mate, LOST
the game:

[Event "?"]
[Site "New York"]
[Date "1924.??.??"]
[Round "?"]
[White "Reti, R "]
[Black "Marshall, F "]
[Result "0-1"]
[ECO "A15"]
[Opening "English opening"]
[Variation "1...Nf6 (Anglo-Indian defence)"]

1. Nf3 Nf6 2. c4 d5 3. cxd5 Nxd5 4. d4 Bf5 5. Nc3 e6 6. Qb3 Nc6 7. e4 Nxc3
8. exf5 Nd5 9. Bb5 Bb4+ 10. Bd2 Bxd2+ 11. Nxd2 exf5 12. Bxc6+ bxc6 13. O-O
O-O 14. Qa4 Rb8 15. Nb3 Rb6 16. Qxa7 Qg5 17. Qa5 c5 18. Qxc5 Nf4 19. g3 Rh6
20. Qxc7 Ne2+ 21. Kg2 Qg4 22. Rh1 f4 23. f3 Qh3+ 24. Kf2 Rc8 25. Qa5 Nxg3
26. Rhg1 Qxh2+ 27. Rg2 Qh4 28. Rc1 Re8 29. Qb5 Ne4+ 30. Kf1 Qh1+ 0-1





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