Author: Uri Blass
Date: 00:33:34 01/03/02
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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
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