Author: Ed Trice
Date: 15:35:50 01/30/04
Go up one level in this thread
Hi Kurt, Just think with the King + 2 pawn vs. King + 2 pawn 6 piece tablebased probed in RAM, this would be solved with a 4-ply search, maybe even sooner because of check/capture extensions! >The position below is from a 90m+30s game between >Shredder8 and ChessTiger15 in which White easily >won with 45.Qf6 and an won pawn ending. Interesting >to see that many engines do not find the winning >move within reasonalbe time, i.e. Chess Tiger 15 >whereas it's no problem for Chess Tiger 14. >Kurt > >[D]8/4Q3/p5k1/1p2P3/5q2/P2K4/1P6/8 w - - 0 46 > > >Shredder 8 - Chess Tiger 15.0 >8/6k1/p3Q3/1p2P3/5q2/P2K4/1P6/8 w - - 0 1 > >Analysis by Chess Tiger 14.0: > >45.Qd7+ Kg6 46.Qc6+ Kg5 47.e6 Qf1+ 48.Kd2 Qf4+ 49.Kc2 Qf5+ 50.Kc3 > +- (1.52) Depth: 7 00:00:00 179kN >45.Qd7+ Kg6 46.Qd6+ Kh5 47.b3 Qg3+ 48.Kd4 Qxb3 49.Qxa6 Qc4+ 50.Ke3 > ± (1.40) Depth: 7 00:00:00 297kN >45.Qd7+ Kg6 46.Qd6+ Kg5 47.Qd8+ Kh5 48.Qd5 Kg5 49.b3 Qf1+ 50.Kd2 > ± (1.34) Depth: 8 00:00:01 670kN >45.Qd6 Qc4+ 46.Ke3 Qb3+ 47.Ke4 Qc2+ 48.Qd3 Qxb2 49.Qd7+ Kf8 50.Qd6+ Ke8 51.Qxa6 > ± (1.40) Depth: 8 00:00:02 769kN >45.Qe7+ Kg6 46.b3 Qg3+ 47.Kd4 Qf4+ 48.Kc5 Qe3+ 49.Kd6 Qd3+ 50.Kc7 Qxb3 51.Qf6+ >Kh5 52.Qxa6 > +- (1.44) Depth: 8 00:00:02 989kN >45.Qe7+ Kg6 46.b3 Qg3+ 47.Kd4 Qf4+ 48.Kc5 Qe3+ 49.Kd6 Qd3+ 50.Kc7 Qxb3 51.Qf6+ >Kh5 52.Qxa6 > +- (1.44) Depth: 9 00:00:03 1316kN >45.Qe7+ Kg6 46.b3 Qg3+ 47.Kd4 Qxb3 48.Qf6+ Kh5 49.Qxa6 Qc4+ 50.Ke3 Qc3+ 51.Ke4 >Qc4+ 52.Kf3 Qc3+ 53.Kf4 > ± (1.38) Depth: 10 00:00:07 2750kN >45.Qf6+ Qxf6 46.exf6+ Kxf6 47.Kd4 Ke6 48.Kc5 Ke5 49.Kb6 Kd4 50.Kxa6 Kc4 51.Ka5 > +- (1.42) Depth: 10 00:00:08 3482kN >45.Qf6+ Qxf6 46.exf6+ Kxf6 47.Kd4 Ke6 48.Kc5 Ke5 49.Kb6 Kd4 50.Kxa6 Kc4 51.Ka5 > +- (1.42) Depth: 11 00:00:10 4045kN, tb=3 >45.Qf6+ Qxf6 46.exf6+ Kxf6 47.Kd4 Ke6 48.Kc5 Ke5 49.Kb6 Kd4 50.Kxa6 Kc5 51.b4+ >Kc4 52.Ka5 > +- (1.44) Depth: 12 00:00:16 6530kN, tb=21 >45.Qf6+ > +- (2.34) Depth: 13 00:00:23 9597kN, tb=80 >45.Qf6+ Qxf6 46.exf6+ Kxf6 47.Kd4 Ke6 48.Kc5 Ke5 49.Kb6 Kd4 50.Kxa6 Kc5 51.b4+ >Kc4 52.Ka5 Kb3 53.Kxb5 Kxa3 > +- (7.20) Depth: 13 00:00:23 9607kN, tb=128 >45.Qf6+ Qxf6 46.exf6+ Kxf6 47.Kd4 Ke6 48.Kc5 Ke5 49.Kb6 Kd4 50.Kxa6 Kc5 51.b4+ >Kc4 52.Ka5 Kb3 53.Kxb5 Kxa3 > +- (7.16) Depth: 14 00:00:26 11049kN, tb=258 >45.Qf6+ Qxf6 46.exf6+ Kxf6 47.Kd4 Ke6 48.Kc5 Ke5 49.Kb6 Kd4 50.Kxa6 Kc5 51.b4+ >Kc4 52.Ka5 Kb3 53.Kxb5 Kxa3 > +- (7.16) Depth: 15 00:00:31 13388kN, tb=608 >45.Qf6+ Qxf6 46.exf6+ Kxf6 47.Kd4 Ke6 48.Kc5 Ke5 49.Kb6 Kd4 50.Kxa6 Kc5 51.b4+ >Kc4 52.Ka5 Kb3 53.Kxb5 Kxa3 > +- (7.16) Depth: 16 00:00:41 18574kN, tb=1399 > >(Utzinger, MyTown 30.01.2004) > > >Shredder 8 - Chess Tiger 15.0 >8/6k1/p3Q3/1p2P3/5q2/P2K4/1P6/8 w - - 0 1 > >Analysis by Chess Tiger 15.0: > >45.b3 > +- (1.70) Depth: 1 00:00:00 >45.b3 > +- (1.72) Depth: 1 00:00:00 >45.b3 Kh7 > +- (1.78) Depth: 2 00:00:00 >45.b3 Qf1+ 46.Kc2 Qf2+ 47.Kd1 > +- (1.44) Depth: 3 00:00:00 2kN >45.Qe7+ Kg6 46.Qd6+ Kh5 47.b3 > +- (1.52) Depth: 3 00:00:00 3kN >45.Qd7+ Kg6 46.Qc6+ Kf7 47.e6+ Kf6 48.Qxa6 > +- (1.62) Depth: 3 00:00:00 5kN >45.Qd7+ Kg6 46.Qc6+ Kg5 47.e6 Kf6 48.Qxa6 > +- (1.62) Depth: 4 00:00:00 11kN >45.Qd7+ Kg6 46.Qc6+ Kg5 47.Qe4 Qh2 48.b4 > +- (1.54) Depth: 5 00:00:00 28kN >45.Qd7+ Kg6 46.Qc6+ Kg5 47.e6 Qg3+ 48.Kc2 Qf2+ 49.Kc3 Qe2 > +- (1.60) Depth: 6 00:00:00 82kN >45.Qd7+ Kg6 46.Qd6+ Kh5 47.Qd5 Qg3+ 48.Kc2 Qf2+ 49.Kb3 Qf5 50.Kc3 > ± (1.30) Depth: 7 00:00:00 317kN >45.Qd7+ Kg6 46.Qd6+ Kh5 47.Qd5 Qg3+ 48.Kc2 Qf2+ 49.Kb3 Qe2 50.Qf7+ Kg5 51.Qf6+ >Kh5 > ± (1.30) Depth: 8 00:00:02 889kN >45.Qe7+ Kg6 46.b3 Qg3+ 47.Kd4 Qxb3 48.Qf6+ > ± (1.40) Depth: 8 00:00:03 1253kN >45.Qe7+ Kg6 46.Qd6+ Kg5 47.Qd8+ Kh5 48.Qd4 Qf1+ > ± (1.34) Depth: 9 00:00:05 1996kN >45.Qe7+ Kg6 46.Qd6+ Kg5 47.Qd8+ Kh5 48.Qd4 Qf1+ 49.Kd2 Qf5 50.Qe3 Qe6 51.b3 Kg6 > ± (1.36) Depth: 10 00:00:09 3754kN >45.Qd6 Qc4+ 46.Ke3 Qb3+ 47.Ke4 Qc2+ 48.Qd3 Qc6+ 49.Kf4 Qh6+ 50.Kg4 Qh2 51.Qd7+ >Kf8 52.Qd8+ Kf7 53.Qf6+ Ke8 > ± (1.38) Depth: 10 00:00:13 5280kN >45.Qd6 Qc4+ 46.Ke3 Qb3+ 47.Ke4 Qc2+ 48.Qd3 Qc6+ 49.Kf4 Qc1+ 50.Qe3 Qxb2 51.Qa7+ >Kf8 52.Qxa6 Qf2+ > ± (1.40) Depth: 11 00:00:23 9571kN, tb=1 >45.Qd6 Qc4+ 46.Ke3 Qb3+ 47.Ke4 Qc2+ 48.Qd3 Qc6+ 49.Kf4 Qh6+ 50.Kg4 Qe6+ 51.Qf5 >Qc4+ 52.Kh5 Qc6 53.b4 > ± (1.38) Depth: 12 00:00:32 13409kN, tb=2 >45.Qd6 Qc4+ 46.Ke3 Qb3+ 47.Ke4 Qc2+ 48.Qd3 Qxb2 49.Qd7+ Kf8 50.Qd6+ Ke8 51.Qe6+ >Kd8 52.Qb6+ Kd7 53.Qa7+ Kd8 > ± (1.30) Depth: 13 00:01:22 35014kN, tb=18 >45.Qd6 Qc4+ 46.Ke3 Qb3+ 47.Ke4 Qc2+ 48.Qd3 Qxb2 49.Qd7+ Kh6 50.Qe6+ Kg5 51.Qf6+ >Kg4 52.Qf3+ Kg5 53.Qg3+ Kh5 > ± (1.22) Depth: 14 00:08:27 223480kN, tb=629 >45.Qe7+ Kg6 46.Qd6+ Kg5 47.Qd8+ Kh5 48.Qd4 Qf3+ 49.Kd2 Qb3 50.Ke2 Qe6 51.Kd3 > ± (1.38) Depth: 14 00:12:10 321461kN, tb=707 > >(Utzinger, MyTown 30.01.2004)
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.