Author: blass uri
Date: 23:57:33 05/09/00
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On May 09, 2000 at 23:37:59, Robert Hyatt wrote: >On May 09, 2000 at 10:34:20, Mark Andreoli wrote: > >> >> I recently played a 5 minute blitz game against International Master Nenad >>Aleksic. see moves below: (I lost as I am black.) >> >> 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O >> >> 8.Bc4 Nc6 9. Bb3 Bd7 10.g4 Qa5 11.h4 Rfc8 12.h5 Ne5 13.hxg6 hxg6 >> >> 14.Bh6 Bh8 15.Qd2 b5 16.O-O-O Nc4 17.Bxc4 Rxc4 18.Nb3 Qc7 19.Bf8!! OK >> >> "gang" the parties over. All variations are FORCED and win rather quickly >> for white. The game continued 19. ... Rxf8 20.Rxh8+ Kxh8 21.Qh6+ Kg8 >> >> 22.Rh1 Nh5 22. gxh5 Rxc3 23.hxg6 1-0 >> >> My question is _why_ can't the above mentioned "engines" F5/F6/Hiarcs >>find the move 19. Bf8 (Nenad found it in only 20 seconds). The engines all want >>to play Bg5?? >> >> _which wins too_ in a __long endgame_ however I thought nothing could >>beat these chess computers when it came to tactics. >> Maybe I overlooked something? Maybe Junior,Rebel,CM 7000 or Chess Tiger >>can find this "simple but elegant tactical shot"! Could anyone help me out by >>checking the position after the 18th move. I would love to be corrected and/or >>enlightened. Thanks for any help in solving this _mystery_!? MJA :-( >\ > >I tried this on my quad xeon. It finds Bg5 and then e5 pretty quickly. And >later (depth=14) e5 fails high. I'm not totally convinced that Bf8 is the >absolute best move here. e5 looks pretty strong to me. In fact, Bg5 also >looks pretty strong. e5 and Bg5 are good moves and probably winning but Chessmaster see about +5 pawns advantage after Bf8 when after e5 white has only about +2 pawns advantage. I think that crafty cannot see deep tactics here also because of null move pruning(it does not know not to prune threat mate moves). I guess that changing the null move pruning rules to prune only moves that also do not threat mate at bigger depth can help to find the solution. Uri
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