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Subject: Re: anti-computer position / mate in 10

Author: Melvin S. Schwartz

Date: 10:27:23 05/30/99

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On May 29, 1999 at 17:39:04, William Kerr wrote:

>On May 28, 1999 at 23:56:35, Terry Presgrove wrote:
>
>>Recently I was playing Rebel10c a 30 0 game that went as follows.
>>
>>[Event "?"]
>>[Site "?"]
>>[Date "?"]
>>[Round "-"]
>>[White "?"]
>>[Black "?"]
>>[Result "*"]
>>
>>1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nf3 Be7 8.
>>Be3 O-O 9. Qd2 Ng4 10. Bg5 Bxg5 11. Nxg5 h6 12. h4 hxg5 13. hxg5 Qb6 14.
>>O-O-O Nxf2 15. Nd5 Qd8 16. Qe3 Nxh1 17. Rxh1 Nc6 18. Qg3 Nd4 19. Qh4 Nxe2+
>>20. Kb1 f5 21. Qh8+ Kf7 22. g6+ Ke6 23. Qxg7 fxe4
>>*
>>I thought that I had a won game and went straight forward for the win
>>with 19. Qh4? missing the obvious Bc4 which wins. At the time I had that" I
>>missed the winning line" mentality  and dejectedly aborted the game after move
>>23.(although it turns out whites position is still quite intersting after 24.
>>nc7!)
>>
>> Anyway to the point .... when I went back over the game with Rebel10b I
>>discovered several wins for white but to my amazement I discovered that
>>18. Qg3 was not the best move......but rather( now quite obvious) nf6!! (mate in
>>10). Rebel10b finds in 3:23 on my k6-350 w/100M hash. Crafty 16.6(96M hash)
>>switches to nf6 at 2:21 but does not find mate in 20 minutes. Crafty 16.8 stays
>>with Qg3 for 15 minutes . Up until recently I have felt the top computer
>>programs were at lower GM levels but I am beginning to wonder? Perhaps Dr.Hyatt
>>is correct?
>>
>>The following is the position after move 17.....how long does it take your
>>program to find the mate?
>>
>>r1bq1rk1/1p3pp1/p1np4/3Np1P1/4P3/4Q3/PPP1B1P1/2K4R w - - 0 18
>>
>>TP
>
>
>CM6K  Normal settings  4 seconds on a PII 300 Mhz 32 Meg Hash.

Are you saying it took CM6K only 4 seconds to actually make the move? If so,
what level did you use?

Me



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