Author: Robert Hyatt
Date: 12:18:28 03/16/01
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On March 16, 2001 at 13:53:33, Dann Corbit wrote: >On March 16, 2001 at 09:02:09, Robert Hyatt wrote: >[snip] >>Crafty has solved this many times on fast hardware. Here is a run from a >>21264/600mhz alpha, produced by Tim Mann last year: >> 15-> 5.04 1.88 1. ... Rh7 2. Rb1 Rh5 3. Kg4 Bb7 4. >> Ba3 Kd7 5. Bc5 Rh2 6. Kg3 Rh8 7. Rb2 >> Rh5 8. Kf4 Rh2 >> 16 11.66 1.88 1. ... Rh7 2. Rb1 Bb7 3. Ra1 Ba6 4. >> Rb1 Rf7 5. Ba3 Rf5 6. f4 Kd7 7. Rb2 >> Bb5 8. Bd6 Bc6 9. Kf3 >> 16 27.49 ++ 1. ... Rb4!! >> 16 41.84 2.96 1. ... Rb4 2. cxb4 a4 3. Rb1 Kb5 4. >> f3 a3 5. Ra1 b2 6. Rxa3 b1=Q 7. Ra5+ >> Kb6 8. Bc5+ Kb7 9. Rb5+ Kc6 10. Rb6+ >> Kc7 11. b5 Qf5 >> 16-> 41.84 2.96 1. ... Rb4 2. cxb4 a4 3. Rb1 Kb5 4. >> f3 a3 5. Ra1 b2 6. Rxa3 b1=Q 7. Ra5+ >> Kb6 8. Bc5+ Kb7 9. Rb5+ Kc6 10. Rb6+ >> Kc7 11. b5 Qf5 >> >>Took that machine 27.5 seconds to find this... > >I think something has changed in the eval, since it does not get found any more, >even at very, very long time control. Very possible. This is impossible to solve tactically. So you have to be able to evaluate passed pawns high enough to make tossing the rook look good. I may have changed something somewhere along the way that changed this...
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