Author: Bernhard Bauer
Date: 01:46:44 11/30/99
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On November 30, 1999 at 02:52:20, Paulo Soares wrote: >On November 30, 1999 at 02:22:14, Bernhard Bauer wrote: > >>On November 29, 1999 at 17:01:49, Howard Exner wrote: >> >>>5k2/7K/3P3P/8/3bB3/8/8/8 b - - id Rebel Century - Junior 6.0ss; bm d4e5; >>> >>>This position occurred in the recent tournament in Germany. Here Junior played >>>Ke8 and Rebel eventually won. Can the game be saved with the move Be5? >>>eg: 1. ... Be5 2.d7 Bc7. Are endgame table bases needed for this? >> >>Yes, I think Be5 will save the game, and Crafty has the same opinion. >>Endgame tablebases are very good for this position. I use (most) of the >>5-men class and get the following running on a 2xP3-450. >>Crafty17.2 finds Be5 at ply 15 after 68 sec. >> lines deleted. >> Kh8 8. Kb7 Kg8 9. Bg6 Kh8 10. Kc8 Bh4 >> 11. Kc7 Bg3+ 12. Kb7 Bh4 13. Bd3 Bd8 >> 14. Kc8 Ba5 15. Bg6 Bb6 16. Bf7 >> 28-> 12:21 -3.19 1. ... Be5 2. d7 Bc7 3. Kg6 Kg8 4. >> Kf6 Bd8+ 5. Ke6 Bh4 6. Kd6 Bd8 7. Kc6 >> Kh8 8. Kb7 Kg8 9. Bg6 Kh8 10. Kc8 Bh4 >> 11. Kc7 Bg3+ 12. Kb7 Bh4 13. Kc8 Bf6 >> 14. Be4 Bh4 15. Bf5 Bg5 16. Kc7 Bf4+ >> 17. Kc8 >> >>Kind regards >>Bernhard > >If Endgame Tablebases was good for that position Crafty would not have an >evaluation equal to zero? The evaluation at depth 28 is -3.19. >Paulo Soares, from Brazil Hallo Paulo, if you run this position without tablebases you will get slower and a lack of precision in the evaluation. As you can see Crafty reaches ply 28 in 12:21 min which IMHO is very good. The score doesn't mean much here. Don't think that you should get a score of 0.00 for a drawn position if you use Crafty. Here is an example: FEN: B6k/1B/2B4P/3B3P/4B/8/7P/K w If you run this position you will get a score of about 20, but there is no win. Kind regards Bernhard
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