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Subject: Re: a test position for chess programs(fritz could not solve it in a game)

Author: Ernst Walet

Date: 14:00:12 04/02/00

Go up one level in this thread

Let´s be honest, it takes H7.32 almost 27 minutes to see Kc2 (P3-450, 80MB hash,
4-man TB)

New position
6Q1/8/8/8/1p2p2P/1k6/5PK1/q7 b - - 0 1

Analysis by Hiarcs 7.32:

1...Kb2 2.Qh8+ Kb1 3.Qxa1+ Kxa1
  =  (0.24)   Depth: 1   00:00:00
1...Kb2 2.Qh8+ Kb1 3.Qxa1+ Kxa1
  =  (0.24)   Depth: 2/10   00:00:00
1...Kb2 2.Qh8+ Kb1 3.Qxa1+ Kxa1
  =  (0.24)   Depth: 3/13   00:00:00
1...Kb2 2.Qg7+ Ka2 3.Qa7+ Kb1 4.Qb7 Qd4 5.h5
  ²  (0.33)   Depth: 4/13   00:00:00
1...Kb2 2.Qh8+ Kb1 3.Qb8 Qa3
  =  (0.16)   Depth: 5/18   00:00:01  22kN
1...Kb2 2.Qh8+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6 b2 6.h7 b1Q 7.h8Q+
  =  (0.21)   Depth: 6/21   00:00:02  106kN
1...Kb2 2.Qh8+
  ²  (0.46)   Depth: 7/23   00:00:02  109kN
1...Kb2 2.Qh8+ Kb1 3.Qxa1+ Kxa1 4.h5
  ±  (0.80)   Depth: 7/23   00:00:06  397kN
1...Kc2 2.Qc4+ Qc3 3.Qxe4+ Kd2 4.h5 b3 5.h6 b2 6.h7 Kc1 7.Qh4 Qh8 8.Qh6+ Kd1
  ²  (0.63)   Depth: 7/25   00:00:09  638kN
1...Kc2 2.Qc4+ Qc3 3.Qxe4+ Kc1 4.Qf4+ Kc2 5.h5 b3 6.Qf5+
  ²  (0.57)   Depth: 8/25   00:00:23  1628kN
1...Kc2 2.Qc4+ Qc3 3.Qxe4+ Kc1 4.Qf4+ Kc2 5.h5 b3 6.Qf5+ Qd3 7.Qc5+ Qc3 8.Qxc3+
Kxc3 9.h6 b2 10.h7 b1Q 11.h8Q+ Kc4 12.Qe5 Qd3
  ²  (0.55)   Depth: 9/27   00:00:47  3433kN
1...Kb2 2.Qc4
  ²  (0.32)   Depth: 9/29   00:01:15  5551kN, tb=1
1...Kb2 2.Qc4
  ²  (0.32)   Depth: 9/29   00:01:17  5629kN, tb=1
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6 b2 6.h7 b1Q 7.h8Q+
  =  (0.24)   Depth: 10/29   00:03:39  16128kN, tb=3
1...Kb2 2.Qg7+
  ²  (0.49)   Depth: 11/30   00:03:56  17401kN, tb=3
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6 b2 6.h7 b1Q 7.h8Q+ Qb2 8.Qa8+
  ±  (1.20)   Depth: 11/30   00:04:59  22302kN, tb=6
1...Kc2 2.Qc4+ Qc3 3.Qxe4+ Kc1 4.Qf4+ Kc2 5.Qf5+ Qd3 6.Qxd3+ Kxd3 7.h5 b3 8.h6
  ²  (0.46)   Depth: 11/30   00:26:57  115010kN, tb=43



Shredder4, on the same configuration, also needs almost 21,5 minutes to see Kc5.


 8.01   0:01.49  -0.39-- Kb2 Qg7+ Kb1 Qh7 Qc3 Qxe4+ Ka2 (78.839) 52.9
 8.01   0:02.52  -0.54   Kb2 Qg7+ Kb1 Qh7 Qd4 f3 Ka2 Qxe4 Qd2+ Kg3 b3 (131.298)
52.1
 8 ->   0:02.91  -0.54   Kb2 Qg7+ Kb1 Qh7 Qd4 f3 Ka2 Qxe4 Qd2+ Kg3 b3 (145.658)
49.9
 9.01   0:04.25  -0.61   Kb2 Qg7+ Ka2 Qa7+ Kb1 Qh7 Qa8 f3 Kb2 fxe4 Ka3 h5
(273.258) 64.1
 9 ->   0:04.45  -0.61   Kb2 Qg7+ Ka2 Qa7+ Kb1 Qh7 Qa8 f3 Kb2 fxe4 Ka3 h5
(286.965) 64.4
10.01   0:10.36  -0.42   Kb2 Qc4 b3 Qxe4 Qa6 f4 Ka1 Qe1+ Ka2 f5 Qf6 (1.034.741)
99.8
10 ->   0:10.69  -0.42   Kb2 Qc4 b3 Qxe4 Qa6 f4 Ka1 Qe1+ Ka2 f5 Qf6 (1.069.333)
100.0
11.01   0:26.47  -0.23   Kb2 Qc4 b3 Qxe4 Qd1 Qe5+ Ka2 Qa5+ Kb1 f3 Qd4 Qf5+ Ka2
Qh3 (2.890.680) 109.1
11 ->   0:26.93  -0.23   Kb2 Qc4 b3 Qxe4 Qd1 Qe5+ Ka2 Qa5+ Kb1 f3 Qd4 Qf5+ Ka2
Qh3 (2.937.474) 109.0
12.01   1:15.34   0.00   Kb2 Qc4 b3 Qxe4 Qa6 f4 Ka1 Qe5+ b2 h5 Ka2 Qd5+
(9.242.532) 122.6
12 ->   1:18.60   0.00   Kb2 Qc4 b3 Qxe4 Qa6 f4 Ka1 Qe5+ b2 h5 Ka2 Qd5+
(9.637.333) 122.6
13.01   2:26.22   0.00   Kb2 Qc4 b3 Qxe4 Qa5 Qf4 Ka3 Qe3 Qa6 f4 Ka2 Qf3 b2 Kh1
(18.634.744) 127.4
13 ->   2:32.43   0.00   Kb2 Qc4 b3 Qxe4 Qa5 Qf4 Ka3 Qe3 Qa6 f4 Ka2 Qf3
(19.376.291) 127.1
14.01   4:14.26   0.00   Kb2 Qc4 b3 Qxe4 Qa5 Qf4 Ka3 Qe3 Qa6 f4 Ka2 Qf3 b2 Kh1
(33.022.577) 129.8
14 ->   4:30.65   0.00   Kb2 Qc4 b3 Qxe4 Qa5 Qf4 Ka3 Qe3 Qa6 f4 Ka2 Qf3 b2 Kh1
(35.158.723) 129.9
15.01  11:30.91   0.00   Kb2 Qc4 b3 Qxe4 Qa5 f3 Ka1 Qd4+ b2 f4 Ka2 Qc4+ Ka1 Qd4
Ka2 (91.206.030) 132.0
15 ->  12:13.54   0.00   Kb2 Qc4 b3 Qxe4 Qa5 f3 Ka1 Qd4+ b2 f4 Ka2 Qc4+ Ka1 Qd4
Ka2 (97.007.537) 132.2
16.01  17:37.52  -0.25-- Kb2 Qg7+ Kb1 Qxa1+ Kxa1 h5 Ka2 h6 Kb1 f4 e3 Kf1 Kc1 Ke2
b3 Kxe3 b2 h7 b1N (140.866.436) 133.2
16.01  17:41.08  -0.75-- Kb2 Qg7+ Kb1 Qxa1+ Kxa1 h5 Ka2 h6 Kb1 f4 b3 h7 b2 h8Q
Ka2 (141.385.335) 133.2
16.01  19:32.36  -2.34   Kb2 Qg7+ Kb1 Qxa1+ Kxa1 h5 b3 h6 b2 h7 b1Q h8Q+ Qb2
Qa8+ Kb1 Qxe4+ Ka2 Qc4+ Ka1 Kg1 Qc2 Qf1+ Kb2 Qb5+ (156.403.223) 133.4
16.03  21:22.95  -2.33++ Kc2 Qc4+ Qc3 Qxe4+ Kc1 h5 (171.110.395) 133.3
16.03  22:13.17  -1.98++ Kc2 Qc4+ Qc3 Qxe4+ Kc1 h5 b3 Qf4+ Kd1 Qf5 Kc1 h6 b2
Qg5+ Kc2 Qg6+ Kd2 Qg7 b1Q Qg6 (178.362.633) 133.7
16.03  34:09.59  -0.23   Kc2 Qc4+ Qc3 Qxe4+ Kc1 h5 b3 Qf4+ Kd1 Qg4+ Kd2 Qg5+ Kc2
h6 b2 Qf5+ Kc1 h7 b1Q Qe6 (273.743.622) 133.5
16 ->  34:15.06  -0.23   Kc2 Qc4+ Qc3 Qxe4+ Kc1 h5 b3 Qf4+ Kd1 Qg4+ Kd2 Qg5+ Kc2
h6 b2 Qf5+ Kc1 h7 b1Q Qe6 (274.442.174) 133.5
17.01  57:50.22  -0.01   Kc2 Qc4+ Qc3 Qxe4+ Kc1 Qf4+ Kc2 Qf5+ Kc1 h5 b3 Qg5+ Kd1
Qg6 b2 f4 (463.474.451) 133.5
17 ->  58:32.72  -0.01   Kc2 Qc4+ Qc3 Qxe4+ Kc1 Qf4+ Kc2 Qf5+ Kc1 h5 b3 Qg5+ Kd1
Qg6 b2 f4 (468.799.357) 133.4
best move: Kb3-c2 time: 65:01.278 min  n/s: 133.195  nodes: 519.631.368


Ernst.

• Re: a test position for chess programs(fritz could not solve it in a game) James T. Walker 04:37:37 04/03/00
  • Re: a test position for chess programs(fritz could not solve it in a game) Ernst Walet 08:35:28 04/03/00
• Re: a test position for chess programs(fritz could not solve it in a game) Ernst Walet 22:25:31 04/02/00

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