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

Author: Georg v. Zimmermann

Date: 11:48:31 12/22/99

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On December 22, 1999 at 14:34:48, Dann Corbit wrote:

>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

As far as I can see black will loose the g1-rook here, but I'm not sure, I have
no board here, complicated position. But it does say 0-1, too. Why do you say
Marshall lost?



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