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Subject: Re: How long does it take your program to find Nf6! in this position?

Author: Richard A. Fowell

Date: 22:57:13 10/23/01

Go up one level in this thread


The Macintosh freeware chess program MacChess 5.01
finds this on my old 180 MHz Mac 7300/180 in 67 seconds

(so I would expect less than 15 seconds on a new 800 MHz Mac.)

[ MacChess home page: http://members.aol.com/Macchess/

Tuesday, October 23, 2001  22:41

02/01|00:00:00|         345|   +5| Qf3 Rfe8
03/01|00:00:00|        2380|   +8| Qf3 Rfe8 b3
04/01|00:00:00|        8960|   +6| Qf3 Qd7 b3 Ncd5
05/01|00:00:00|       32275|   +7| Qf3 Qd7 b3 Ncd5 Rc1
05/25|00:00:01|       95991|   +8| Ng5 h6 Nf4 Qd7 Ne4
06/01|00:00:01|      149515|   +4| Ng5 h6 Nf4 Qd7 Ne4 Ncd5
06/05|00:00:03|      374956|   +5| N2g3 Na6 Qg5 Ng6 b3 Nb4
06/15|00:00:04|      549118|  +48| Nd6 Rxd6 Rh3 Re8 exd6 Qxc4 dxc7
07/01|00:00:06|      819877|  +48| Nd6 Rxd6 Rh3 Re8 exd6 Qxc4 dxc7
08/01|00:00:11|     1697171|  +49| Nd6 Rxd6 Rh3 Re8 exd6 Qxc4 dxc7 Kf8
09/01|00:00:32|     4821034|  +52| Nd6 Rxd6 Rh3 h6 exd6 Qxc4 dxe7 Re8 b3
09/37|00:01:07|    10505561| +623| Nf6+ gxf6 Rg3+ Kh8 Qh6 Qxg2+ Rxg2 Ng6 exf6
Rg8 Rxc6 Nd5
10/01|00:01:55|    18375643| +902| Nf6+ gxf6 Rg3+ Kh8 Qh6 Qxg2+ Kxg2 Ng6 Rh3
Nf4+ Nxf4 Rg8+ Kf1 Rg7 Qxf6
11/01|00:03:25|    32896985|+1106| Nf6+ gxf6 Rg3+ Ng6 Rh3 Nh4 Rxh4 Qe4 Rxe4 c5
exf6 Kh8 Rh4 Rd7 dxc5

  1. Nf6+


On October 23, 2001 at 13:12:38, Andrew Williams wrote:

>Hi,
>
>My program lost this game against a crafty clone on ICC recently:
>
>[Event "ICS rated blitz match"]
>[Site "204.178.125.65"]
>[Date "2001.10.21"]
>[Round "-"]
>[White "MoonShot"]
>[Black "PostModernist"]
>[Result "1-0"]
>[WhiteElo "2859"]
>[BlackElo "2772"]
>[TimeControl "600+2"]
>
>1. d4 Nf6 2. c4 c6 3. Nc3 e6 4. e4 Bb4 5. Bd3 d5 6. e5 dxc4 7. Bxc4 Nd5 8.
>Ne2 b6 9. O-O O-O 10. Qd3 Be7 11. Bd2 Bb7 12. Qg3 Kh8 13. Ne4 Ba6 14. Rac1
>Bxc4 15. Rxc4 Qd7 16. Bg5 Na6 17. Bxe7 Nxe7 18. Nd6 Nc7 19. Rfc1 Rad8 20.
>Qf3 Ne8 21. Ne4 Kg8 22. Qh3 a5 23. a4 Nc7 24. Qg4 Kh8 25. Qh5 Kg8 26. R1c3
>Qd5 27. Nf6+ gxf6 28. Rg3+ Kh8 29. Qh6 Ng6 30. Rh3
>{PostModernist resigns} 1-0
>
>
>The move 27.Nf6+ wins everything immediately. MoonShot (crafty 18.12
>on  a K7 1.33GHz) found that in 14 seconds (albeit with hash-tables
>already full). With some fiddling about with null move rules, PM can
>find it in 37 seconds from a "standing start" (K7 1.2GHz). I'd be
>interested to know how other programs do on this.
>
>[D]3r1rk1/2n1nppp/1pp1p3/p2qP2Q/P1RPN3/2R5/1P2NPPP/6K1 w - - bm Nf6
>
>
>Regards
>
>Andrew



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