Author: Martin Giepmans
Date: 18:50:01 04/27/04
Go up one level in this thread
On April 27, 2004 at 21:17:05, Andrew Wagner wrote: >On April 27, 2004 at 20:51:07, Will Singleton wrote: > >>Just looks like tactical error. 58.Qe8+ allows the enemy king to penetrate the >>pawn wall, so the king and queen can threaten material and mate. Maybe you >>still need more depth. How long does it take Trueno to switch to Qd7? (if the >>king now tries to penetrate, lots of pawns fall.) > >I assume you're talking about 56. Qd7 there. The position is: > >[d] 8/5p2/3p4/2p1k1p1/Q1PqP2p/5P1P/6PK/8 w - - 22 56 > >Unfortunately it takes Trueno a good 36 seconds to find that Qd7 is better. >Perhaps my endgame king pcsq table needs some revising. What do others get here? >Andrew > >1. Score: .24; Time: 0; nodes: 71; PV: a4-e8 e5-f6 >2. Score: .7; Time: 0; nodes: 646; PV: a4-e8 e5-f4 e8-f7 f4-e3 >3. Score: .93; Time: 0; nodes: 1976; PV: a4-e8 e5-f4 e8-f7 f4-e3 h2-g1 >4. Score: .15; Time: 0; nodes: 10810; PV: a4-e8 e5-f6 e8-a4 f6-e7 h2-h1 >5. Score: .17; Time: 1; nodes: 35936; PV: a4-e8 e5-f6 e8-d8 f6-g6 d8-g8 d4-g7 >g8-a8 g7-b2 >6. Score: .16; Time: 2; nodes: 88255; PV: a4-e8 e5-f6 e8-d8 f6-g6 d8-g8 d4-g7 >g8-b8 g7-e5 h2-h1 e5-a1 h1-h2 >7. Score: .27; Time: 11; nodes: 449614; PV: a4-e8 e5-f6 e8-d8 f6-g6 d8-g8 d4-g7 >g8-a8 g6-f6 e4-e5 f6-e6 a8-e8 e6-f5 >8. Score: .12; Time: 36; nodes: 1531330; PV: a4-d7 d4-c4 d7-g4 e5-d4 e4-e5 d4-d5 >g4-c4 d5-c4 e5-d6 f7-f5 d6-d7 Perhaps Trueno doesn't have enough check related extensions. My engine considers Qe8 only for a fraction of a second and switches to Qd7 after that. Martin
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