Author: Slater Wold
Date: 13:42:07 03/31/04
Go up one level in this thread
On March 31, 2004 at 16:12:37, Gerd Isenberg wrote: >On March 31, 2004 at 14:49:37, Slater Wold wrote: > >>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? :) > >It's not only about porting mmx- inline assembly to wrapped intrinsics or >gcc-assembler. It's a complete new bitboard infrastructure and movegeneration. > And a complete new eval, porting most king safety (mate detection) ideas, but >implemeting things completely different and more efficient with respect to new >data structures. Is IsiChess bb? >With the good news from Eugene about future ms compiler i'm a bit more >optimistic now. But my time is soo limited :-( Public beta in June! >So i really don't know - one, two or more years... Whoa! That's too bad. :( >Cheers, >Gerd
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