Author: Jouni Uski
Date: 21:59:00 01/03/02
Go up one level in this thread
On January 03, 2002 at 03:33:34, Uri Blass wrote: >On January 03, 2002 at 01:05:14, Jouni Uski wrote: > >>[D]k7/P7/P7/P7/P7/P7/P7/R3K3 w Q - 0 1 >> >>Mate in 8 >> >>I tried this at home with Tiger14 and Fritz7 and Shredder5.32. None of them has >>any idea about mate in 8. Then I tried with Mate2.1, but no solution under 30 >>minutes. What's the problem? Only Yace gives CORRECT mate in few seconds. Is >>this null move problem? >> >>Jouni > >programs of today have no problem with it >They may see wrong number of moves to mate but they always see the mate in few >seconds on p800 > > >New position >k7/P7/P7/P7/P7/P7/P7/R3K3 w Q - 0 1 > >Analysis by Chess Tiger 14.0: > >1.0-0-0 Kxa7 2.Rd6 Ka8 3.Rd7 Kb8 4.Kb1 Ka8 5.Rc7 Kb8 6.a7+ Ka8 7.a6 > +- (22.08) Depth: 13 00:00:00 148kN >1.Rd1 Kxa7 2.Rd6 Kb8 3.Rd7 Ka8 4.Kd2 Kb8 5.Kc3 Ka8 6.Kb4 Kb8 7.a7+ Ka8 > +- (21.98) Depth: 13 00:00:01 477kN, tb=7 >1.Rd1 Kxa7 2.Rd6 Kb8 3.Rd7 Ka8 4.Kd2 Kb8 5.Kc3 Ka8 6.Kb4 Kb8 7.a7+ Ka8 8.a6 > +- (21.98) Depth: 14 00:00:01 698kN, tb=51 >1.0-0-0 > +- (22.88) Depth: 14 00:00:02 997kN, tb=63 >1.0-0-0 Kxa7 2.Kc2 Kxa6 3.Rd7 Kxa5 4.Rd6 Kxa4 5.Rd5 Kxa3 6.Rd4 Kxa2 7.Ra4# > +- (#7) Depth: 14 00:00:03 1281kN, tb=68 >1.0-0-0 Kxa7 2.Kc2 Kxa6 3.Rd7 Kxa5 4.Rd6 Kxa4 5.Rd5 Kxa3 6.Rd4 Kxa2 7.Ra4# > +- (#7) Depth: 15 00:00:04 1619kN, tb=220 > >(Blass, Tel-aviv 03.01.2002) > >Crafty(1 mbytes hash) > >New position >k7/P7/P7/P7/P7/P7/P7/R3K3 w Q - 0 1 > >Analysis by Crafty 18.12: > >1.0-0-0 Kxa7 > +- (12.88) Depth: 1/3 00:00:00 >1.0-0-0 Kxa7 > +- (12.88) Depth: 2/3 00:00:00 >1.0-0-0 Kxa7 2.Rd6 > +- (12.93) Depth: 3/3 00:00:00 >1.0-0-0 Kxa7 2.Rd6 > +- (13.33) Depth: 4/5 00:00:00 >1.0-0-0 Kxa7 2.Rd6 Kb8 > +- (13.55) Depth: 4/5 00:00:00 >1.0-0-0 Kxa7 2.Rd6 Kb8 > +- (13.95) Depth: 5/8 00:00:00 >1.0-0-0 Kxa7 2.Rd6 Kb8 3.Rd7 > +- (14.05) Depth: 5/8 00:00:00 >1.0-0-0 Kxa7 2.Rd6 Kb8 3.Rd7 Kc8 > +- (14.05) Depth: 6/10 00:00:00 4kN >1.0-0-0 Kxa7 2.Rd6 Ka8 3.Rd7 Kb8 4.Kd2 > +- (14.15) Depth: 7/12 00:00:00 14kN >1.0-0-0 Kxa7 2.Rd6 Ka8 3.Rd7 Kb8 4.Kd2 Kc8 > +- (14.15) Depth: 8/14 00:00:00 40kN >1.0-0-0 Kxa7 2.Rd6 Ka8 3.Rd7 Kb8 4.Kd2 Ka8 5.Rc7 > +- (14.23) Depth: 9/16 00:00:00 113kN >1.0-0-0 Kxa7 2.Rd6 Ka8 3.Rd7 Kb8 4.Kd2 Ka8 5.Kc3 Kb8 > +- (14.45) Depth: 10/18 00:00:00 257kN >1.0-0-0 Kxa7 2.Rd6 Ka8 3.Rd7 Kb8 4.Kd2 Ka8 5.Kc3 Kb8 6.a7+ Ka8 7.a6 > +- (14.54) Depth: 11/19 00:00:01 614kN, tb=6 >1.0-0-0 Kxa7 2.Rd6 Ka8 3.Rd7 Kb8 4.Kd2 Ka8 5.Kc3 Kb8 6.a7+ Ka8 7.a6 > +- (14.94) Depth: 12/21 00:00:01 1212kN, tb=41 >1.0-0-0 Kxa7 2.Rd7+ Kb8 3.Kd2 Ka8 4.Rd8+ Ka7 5.Kc2 > +- (#10) Depth: 12/21 00:00:06 4242kN, tb=42 > >(Blass, Tel-aviv 03.01.2002) > >New position >k7/P7/P7/P7/P7/P7/P7/R3K3 w Q - 0 1 > >Analysis by Junior 7: > >1.Rd1 Kxa7 2.Rd6 > +- (6.37) Depth: 3 00:00:00 >1.Rd1 Kxa7 2.Rd6 Kb8 3.Rd8+ Ka7 > +- (6.53) Depth: 6 00:00:00 >1.Rd1! > +- (6.83) Depth: 9 00:00:00 1kN >1.Rd1! Kxa7 2.Rd6 Kb8 3.Rd7 Ka8 4.Rb7 > +- (6.87) Depth: 9 00:00:00 2kN >1.Rd1! > +- (7.17) Depth: 12 00:00:00 7kN >1.Rd1! Kxa7 2.Rd6 Kb8 3.Rd7 Ka8 4.Rc7 Kb8 5.a7+ Ka8 6.a6 > +- (7.95) Depth: 12 00:00:00 18kN, tb=2 >1.Rd1 Kxa7 2.Rd6 Kb8 3.Rd7 Ka8 4.Rh7 Kb8 5.a7+ Ka8 6.a6 > +- (7.95) Depth: 15 00:00:00 143kN, tb=349 >1.0-0-0 Kxa7 2.Rd7+ Kxa6 3.Kc2 Kxa5 4.Rd6 Kxa4 > +- (7.96) Depth: 15 00:00:00 285kN, tb=730 >1.0-0-0! > +- (8.26) Depth: 18 00:00:00 334kN, tb=909 >1.0-0-0! Kxa7 2.Kc2 Kxa6 3.Rd7 Kxa5 4.Rd6 Kxa4 > +- (8.27) Depth: 18 00:00:01 651kN, tb=1457 >1.0-0-0! > +- (8.57) Depth: 21 00:00:02 1063kN, tb=3425 >1.0-0-0! Kxa7 2.Rd7+ Kb8 3.Kc2 Ka8 4.Rd8+ Ka7 5.Kc3 Kxa6 6.Rd7 Kxa5 7.Rd6 > +- (#6) Depth: 21 00:00:07 5689kN, tb=3710 >1.0-0-0! Kxa7 2.Rd7+ Kb8 3.Kc2 Ka8 4.Rd8+ Ka7 5.Kc3 Kxa6 6.Rd7 Kxa5 7.Rd6 > +- (#6) Depth: 21 00:00:08 6039kN, tb=3852 > >(Blass, Tel-aviv 03.01.2002) > >Uri I think these kind of results are useless! Because of white's enormous material benefit it's easy to quess, that white can mate wit any move, but I want exact number of moves! Jouni
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