Author: Ernst Walet
Date: 04:20:46 01/03/02
Go up one level in this thread
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
Shredder 4.0 with 3+4 piece EGTB sees the mate right away.
Ernst.
[Event "?"]
[Site "?"]
[Date "2002.01.03"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]
[SetUp "1"]
new game!
position:
[FEN "k7/P7/P7/P7/P7/P7/P7/R3K3 w Q -"]
tablebases with 4 pieces found! [Cache: 1 MB + internal 1.25 MB]
endgame databases: 0
k7/P7/P7/P7/P7/P7/P7/R3K3 w Q -
+---+---+---+---+---+---+---+---+
8 |*K*|:::| |:::| |:::| |:::
+---+---+---+---+---+---+---+---+
7 | P | |:::| |:::| |:::|
+---+---+---+---+---+---+---+---+
6 | P |:::| |:::| |:::| |:::
+---+---+---+---+---+---+---+---+
5 | P | |:::| |:::| |:::|
+---+---+---+---+---+---+---+---+
4 | P |:::| |:::| |:::| |:::
+---+---+---+---+---+---+---+---+
3 | P | |:::| |:::| |:::|
+---+---+---+---+---+---+---+---+
2 | P |:::| |:::| |:::| |:::
+---+---+---+---+---+---+---+---+
1 | R | |:::| | K | |:::|
+---+---+---+---+---+---+---+---+
a b c d e f g h
12.01 0:00.50 +M8 O-O-O Kxa7 Rd8 Kxa6 Rd7 Kxa5 Rd6 Kxa4 Rd5 Kxa3
(221.225) 442.4
12 -> 0:00.62 +M8 O-O-O Kxa7 Rd8 Kxa6 Rd7 Kxa5 Rd6 Kxa4 Rd5 Kxa3
(290.817) 465.3
13.01 0:00.70 +M8 O-O-O Kxa7 Rd8 Kxa6 Rd7 Kxa5 Rd6 Kxa4 Rd5 Kxa3
(339.199) 482.5
13 -> 0:00.87 +M8 O-O-O Kxa7 Rd8 Kxa6 Rd7 Kxa5 Rd6 Kxa4 Rd5 Kxa3
(445.744) 509.4
14.01 0:01.03 +M8 O-O-O Kxa7 Rd8 Kxa6 Rd7 Kxa5 Rd6 Kxa4 Rd5 Kxa3
(536.512) 520.3
14 -> 0:01.31 +M8 O-O-O Kxa7 Rd8 Kxa6 Rd7 Kxa5 Rd6 Kxa4 Rd5 (706.999)
538.4
15.01 0:01.73 +M8 O-O-O Kxa7 Rd8 Kxa6 Rd7 Kxa5 Rd6 Kxa4 Rd5 Kxa3
(921.028) 531.1
15 -> 0:02.32 +M8 O-O-O Kxa7 Rd8 Kxa6 Rd7 Kxa5 Rd6 Kxa4 Rd5 Kxa3
(1.264.188) 543.0
16.01 0:02.73 +M8 O-O-O Kxa7 Rd8 Kxa6 Rd7 Kxa5 Rd6 Kxa4 Rd5 Kxa3
(1.509.071) 551.9
16 -> 0:03.46 +M8 O-O-O Kxa7 Rd8 Kxa6 Rd7 Kxa5 Rd6 Kxa4 Rd5 Kxa3
(1.952.769) 562.9
best move: O-O-O time: 0:03.469 min n/s: 562.919 CPU 93.6% nodes: 1.952.769
saving in file D:\shredder4\lastgame.pgn!
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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