Author: Steffen Jakob
Date: 01:23:31 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?
Hossa sees mate in 8 after 1.52 seconds. In this position Hossa switches in to a
special mating mode which might help here. The meaning of the 166.x scores is:
"I know that there will be soon a mate, but I don' know yet when."
depth value time nodes pv
1 +166.64 0.00 3 1.Kf2 Kxa7
<1> +166.64 0.00 19 1.Kf2 Kxa7
2 +166.64 0.00 22 1.Kf2 Kxa7
<2> +166.64 0.00 38 1.Kf2 Kxa7
3 +166.65 0.00 60 1.Kf2 Kxa7 2.Ke3
<3> +166.65 0.00 197 1.Kf2 Kxa7 2.Ke3
4 +166.64 0.00 236 1.Kf2 Kxa7 2.Ke3 Kb8
2/4 +166.65 0.00 281 1.Ke2 Kxa7 2.a1b1 Kxa6
3/4 +166.68 0.00 339 1.a1b1 Kxa7 2.b1b6 Ka8
<4> +166.68 0.01 542 1.a1b1 Kxa7 2.b1b6 Ka8
5 +166.69 0.01 926 1.a1b1 Kxa7 2.b1b6 Ka8 3.Kf2
<5> +166.69 0.01 2630 1.a1b1 Kxa7 2.b1b6 Ka8 3.Kf2
6 +166.66 0.08 3833 1.a1b1 Kxa7 2.b1b7 Kxa6 3.b7c7 Kxa5
4.Kd2
<6> +166.66 0.09 8014 1.a1b1 Kxa7 2.b1b7 Kxa6 3.b7c7 Kxa5
4.Kd2
7 +166.68 0.11 12762 1.a1b1 Kxa7 2.b1b7 Kxa6 3.b7b5 Ka7
4.b5b6 Ka8
<7> +166.68 0.16 28213 1.a1b1 Kxa7 2.b1b7 Kxa6 3.b7b5 Ka7
4.b5b6 Ka8
8 +166.70 0.20 38777 1.a1b1 Kxa7 2.b1b6 Ka8 3.Kf2 Ka7
4.Ke3 Ka8
<8> +166.70 0.29 75796 1.a1b1 Kxa7 2.b1b6 Ka8 3.Kf2 Ka7
4.Ke3 Ka8
9 +166.71 0.43 103079 1.a1b1 Kxa7 2.b1b6 Ka8 3.Kf2 Ka7
4.Ke3 Ka8 5.Ke4
<9> +166.71 0.74 210759 1.a1b1 Kxa7 2.b1b6 Ka8 3.Kf2 Ka7
4.Ke3 Ka8 5.Ke4
10 +166.70 1.11 339783 1.a1b1 Kxa7 2.b1b7 Ka8 3.b7d7 Kb8
4.Ke2 Ka8 5.d7d8 Ka7 6.d8a8 Kxa8
7.Kd3
!2/10 +167.13 1.36 424207 1.O-O-O
! 10 #8 1.52 484256 1.O-O-O Kxa7 2.d1d8 Kxa6 3.d8d7 Kxa5
4.d7d6 Kxa4 5.d6d5 Kxa3
<10> #8 1.87 609618 1.O-O-O Kxa7 2.d1d8 Kxa6 3.d8d7 Kxa5
4.d7d6 Kxa4 5.d6d5 Kxa3
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