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Subject: Re: Interesting knight sac

Author: Slater Wold

Date: 11:49:37 03/31/04

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On March 31, 2004 at 12:49:04, Gerd Isenberg wrote:

>On March 31, 2004 at 06:31:28, Tord Romstad wrote:
>
>>I just completed a 100-game blitz match between Gothmog 0.4.7 and Crafty 19.9
>>(yes, I know it is not the most recent version).  In one of the games, the
>>following position arised:
>>
>>[D]r2qr3/4bpkp/p2p2pN/1p1P4/2pNP3/1b5P/1P1Q1PP1/R3R1K1 w - -
>>
>>Here, Gothmog surprised me (and Crafty) by playing the knight sac Nxf7!?.  It
>>plays this after only 7 plies and 1 second, almost certainly as a speculative
>>sac, but still keeps it with a +1 score after 20 minutes and 16 plies.  In
>>the game, Gothmog quickly got a winning attack after 24. Nxf7 Kxf7 25. Ne6 Qc8
>>26. Qh6 Bf8 27. Qxh7+ Kf6 28. Re3.
>>
>>Which other engines like Nxf7?  Is the sac correct?
>
>IsiChess MMX (Athlon XP2.7+ 256 MB Hash) likes Nxf7 too, after 7 seconds with
>slight minus then draw score. 40 seconds to get the first plus (+0.17).
>After two minutes +0.54:
>
>1.Nxf7 Kxf7 2.Ne6 Qb6 3.Qh6 Rc8 4.Qxh7+ Ke8 5.Qxg6+ Kd7 6.Qf5 Rg8 7.e5 Ke8

So...when can I expect a nice, Gerd optimized, 64-bit IsiChess?  :)



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