Author: Drexel,Michael
Date: 10:12:47 01/11/03
Go up one level in this thread
On January 11, 2003 at 11:14:10, Robert Hyatt wrote: >On January 11, 2003 at 07:43:24, Drexel,Michael wrote: > >>[D] 4nnk1/8/6b1/4BP2/2N1B1K1/8/8/8 b - - 0 1 >> >>I just came over this endgame position with Crafty 19.01 as analysis engine in >>CB-GUI. Crafty suggested 1...Bxf5+ with a score of 0.01. >>1...Bf7 seems to be a simple draw. >>you probably told him 3 pieces against 2 pieces without pawns is draw, but I >>doubt this is a good idea in the endgame BBNK vs. NNK. You might be better >>informed but I would think this endgame is almost always a win and would even >>assume that it is almost always a win within 50 moves. >>If I were a tablebase-expert like you, I would fix it immediatly, whether it is >>important or not. >> >> >>In games against Fritz 8 Crafty will resign in not more than 8 moves: >> >>[Event "ATHLONXP"] >>[Site "ATHLONXP"] >>[Date "2003.01.5"] >>[Round "1"] >>[White "Fritz 8"] >>[Black "Crafty 19.01"] >>[Result "1-0"] >>[SetUp "1"] >>[FEN "4nnk1/8/6b1/4BP2/2N1B1K1/8/8/8 b - - 0 1"] >>[PlyCount "14"] >> >>1... Bxf5+ 2. Bxf5 Ng7 3. Be4 Nge6 4. Kf5 Kf7 5. Bd5 Ke7 6. Bd6+ Kd7 7. Ke5 >>Ng6+ 8. Kf6 1-0 > >First, Crafty well knows that KBB vs KN is a win. But it isn't seeing that >here until way deep into the search. In 99.999999999999% of these endgames >with 3 minors vs 2 minors, the game is a draw. Handling that one special case >here and there is not going to make it play better, and would almost certainly >hurt it overall as it really should say KBBN vs KNN is a draw in almost all >cases. in almost all cases King is stuck at the edge of the board KBBN vs KNN should be a win: -various mate threats -Zugzwang positions -trade down to KBB vs. KN (<50) in general two bishops and knight should do much better than rook and bishop. maybe this is an illusion or doesnt matter due to 50 moves rule. we will see.
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