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Subject: Re: Zugzwang

Author: Stan Arts

Date: 07:36:14 09/10/04

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On September 10, 2004 at 10:18:30, Mihaly Szalai wrote:

>From the game Jung - Szabados (1952)
>
>[D]8/6B1/p5p1/Pp4kp/1P5r/5P1Q/4q1PK/8 w - - 0 32
>
>32. Qxh4! Kxh4 33. Bf6+ g5 34. Bc3!!
>
>Hiarcs 9 have problems with it even after 20 minutes.
>
>Show it to your engine.
>
>Thanks
>Mihaly

Hi

Neurosis1.8 finds it fairly quick.

P3-550 48MB hash.

Legal moves: 14   Static score: -149
Ply Score Time     Nodes      Best move and expected line
------------------------------------------------------------
2   -2    0        645        Bh6+ Kxh6 Qxh4
3   -2    0        753        Bh6+ Kxh6 Qxh4
3   1     0        1071       Bf6+ Kxf6 Qxh4+ Kf5 Qg3
4   1     0        1945       Bf6+ Kxf6 Qxh4+ Kf5 Qg3
5   1     5        5230       Bf6+ Kxf6 Qxh4+ Kf5 Qh3+ Kg5 Qg3+ Kh6 Kg1
6   1     22       21672      Bf6+ Kxf6 Qxh4+ Kf5 Qh3+ Kf6 Qc8 Qe6
7   1     110      105370     Bf6+ Kxf6 Qxh4+ Ke6 Qh3+ Ke7 Qh4+ Ke6 Qh3+ Ke7
Qh4+ Ke6
8   1     313      306420     Bf6+ Kxf6 Qxh4+ Ke6 Qh3+ Kd5 f4 Qf1 Qd7+ Kc4 Qd6
9   1     752      737113     Bf6+ Kxf6 Qxh4+ Ke6 Qh3+ Kd5 f4 Qf2 Qd3+ Qd4 Qb3+
Qc4 Qd1+ Qd4 Qf3+ Kc4 Qg3
10  2     2807     2825111    Bf6+ Kxf6 Qxh4+ Ke6 Qd8 Kf7 Qb6 Qe5+ Kh3 Qe6+ Kh2
g5 g3 Kh1
10  3     2845     2864124    Qxh4+ < + > Kf5 Qe5+ Bxe5 Kxe5 Qxh5+ gxh5 Kh3
10  3     2845     2866113    Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qc5 bxc5 g4 g3+ Kg5
Bf6+ Kxf6 f4
11  43    3510     3442510    Qxh4+ < + > Kf5 Kh3
11  123   3532     3466918    Qxh4+ < + > Kf5 Kh3 Ke6 Bf6 Kd7 g4 Qxf3+ Kh2 Qxg4
11  363   3614     3566995    Qxh4+ < + > Kf5 Qf6+ Ke6+ Kd5 Qc3 h4 Qd4+ Kc6 Qxh4
11  381   3922     3843426    Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3
f5
12  374   5048     4817404    Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3
f5 Kg5
13  384   7733     7236886    Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3
f5 Kg5 f6
14  374   15363    13671077   Qxh4+ Kxh4 Bf6+ g5 Bc3 Qf2 Be5 Qg1+ Kxg1 g4 f4 g3
f5 Kg5 f6 Kf5
Total nodes:26338073 n/sec:89200  (Q-nodes:9% max depth:34)

Greetings
Stan



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