Author: Dan Homan
Date: 06:53:23 11/05/99
Go up one level in this thread
On November 05, 1999 at 09:28:30, Rémi Coulom wrote: >On November 05, 1999 at 08:46:59, Bernhard Bauer wrote: > >>On November 05, 1999 at 06:31:49, Howard Exner wrote: >> >>>1. b5+ Qxb5 2. Nd3 Qxc4+ 3. Nf4 Qxe2 4. Nxe2 >>>Input this into Crafty and where it goes. >>>White has to take care not to fall into a drawn ending with the >>>eventually advanced black rook pawn. Also the KQN vs kq should be avoided. >>>I tried what looked like good defenses for black but always came up a move >>>or two short >>>of drawing. If black just goes ahead and advances the a pawn white will >>>capture the g7 pawn with the king and win by one tempo. Those endgame tablebases >>>should come in handy. >> >>Thank you for your explanation. The line you give seams good. >>A human analysis is still better than anyone done by a computer. >>Anyway it would be interesting to know what other programs think. >>Kind regards >>Bernhard > >After 1. b5+ Qxb5 2. Nd3, black is in zugzwang. A program that does not do the >null move should find 1. b5+ at depth 5 or so. > >Remi You are right. With Null-Move ON, I can't solve this; however, with Null-Move OFF, my program gives..... White-To-Move[1]: setboard 4q/p5p/k5P/8/1PN4K/8/1N2B/8 w - - White-To-Move[1]: analyze Analysis mode: Enter commands/moves as ready. 1. -0.29 0 5 1. b5+ 1. 0.69 0 20 1. Ne5+ 1. 0.74 0 38 1. Bh5 1. 0.83 0 39 1. Bd3 1. 0.83 0 47 1. Bd3 2. -0.09 0 97 1. Bd3 Qe7+ 2. 0.68 0 373 1. Ne3+ Kb7 2. 0.76 0 623 1. Ne5+ Kb6 2. 0.76 0 625 1. Ne5+ Kb6 3. 0.77 0 1067 1. Ne5+ Kb7 2. Bf3+ 3. 0.77 0 1757 1. Ne5+ Kb7 2. Bf3+ 4. 0.72 0 3029 1. Ne5+ Kb7 2. Nbd3 Qd8+ 4. 0.72 0 6498 1. Ne5+ Kb7 2. Nbd3 Qd8+ 5. 0.67 0 23379 1. Ne5+ Kb6 2. Nbd3 Qe7+ 3. Kh5 5. 0.67 0 35024 1. Ne5+ Kb6 2. Nbd3 Qe7+ 3. Kh5 6. 0.70 0 61289 1. Ne5+ Kb6 2. Nbd3 Qb5 3. Kg5 a5 6. 3.08 0 69020 1. b5+ Qxb5 2. Nd3 Qxc4+ 3. Nf4 Kb5 6. 3.08 0 104884 1. b5+ Qxb5 2. Nd3 Qxc4+ 3. Nf4 Kb5 7. 3.08 0 126097 1. b5+ Qxb5 2. Nd3 Qxc4+ 3. Nf4 Qxe2 4. Nxe2 7. 3.08 1 266906 1. b5+ Qxb5 2. Nd3 Qxc4+ 3. Nf4 Qxe2 4. Nxe2 8. 2.30 2 350220 1. b5+ Qxb5 2. Nd3 Qxc4+ 3. Nf4 Qxe2 4. Nxe2 Kb6 8. 2.30 4 864629 1. b5+ Qxb5 2. Nd3 Qxc4+ 3. Nf4 Qxe2 4. Nxe2 Kb6 9. 2.33 6 1073705 1. b5+ Qxb5 2. Nd3 Qxc4+ 3. Nf4 Qxe2 4. Nxe2 Kb6 5. Kg5 9. 2.33 14 2261235 1. b5+ Qxb5 2. Nd3 Qxc4+ 3. Nf4 Qxe2 4. Nxe2 Kb6 5. Kg5 10. 5.47 23 3850853 1. b5+ Qxb5 2. Nd3 Qb8 3. Nc5+ Kb5 4. Ne5+ Kc5 5. Nd7+ Kd6 10. 5.47 47 7441622 1. b5+ Qxb5 2. Nd3 Qb8 3. Nc5+ Kb5 4. Ne5+ Kc5 5. Nd7+ Kd6 11. 5.48 60 9885919 1. b5+ Qxb5 2. Nd3 Qb8 3. Nc5+ Kb5 4. Ne5+ Kc5 5. Nd7+ Kd6 6. Nxb8 11. 5.48 131 19784897 1. b5+ Qxb5 2. Nd3 Qb8 3. Nc5+ Kb5 4. Ne5+ Kc5 5. Nd7+ Kd6 6. Nxb8 - Dan
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