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Subject: Re: CSVN Leiden: What is wrong with c5c4 or d5d4 ?

Author: Jorge Pichard

Date: 15:47:10 04/24/04

Go up one level in this thread


On April 24, 2004 at 15:16:43, Christophe Theron wrote:

>On April 24, 2004 at 14:50:18, Uri Blass wrote:
>
>>On April 24, 2004 at 13:06:18, Djordje Vidanovic wrote:
>>
>><snipped>
>>>Tiger played just like a human.  Exploited the immobility of the opponent's rook
>>>with uncanny, almost human, understanding...  I like Tiger a lot.
>>>
>>>Djordje
>>
>>I suspect that cxb4 is also a search problem and Isichess did not search deep
>>enough.
>>
>>Of course it is possible to solve everything by better evaluation but as you
>>said search is also knowledge.
>>
>>Here is some search of movei(p850,32 mbytes hash).
>>
>>Movei needs a long time to avoid cxb4 but I doubt if the laternative that it
>>finds is better(it is not the Rh4 move that was suggested by Kurt).
>>
>>[D]7R/p1k4p/6p1/1ppp3r/1P6/2P4P/P4PP1/6K1 b - - 0 1
>>
>
>
>
>Chess Tiger switches from cxb4 to Rh4 in 1min 54s (ply depth 16) on my P3M-933
>(6Mb hash).
>
>
>
>    Christophe

What is wrong with c5c4 or d5d4 ?

SOS.4 for Arena  UCI 29 MB:
 1   00:00  0.50   c5xb4 c3xb4
 2   00:00  0.50   c5xb4 c3xb4
 3   00:00  0.39   c5xb4 c3xb4 Kc7d6
 4   00:00  0.39   c5xb4 c3xb4 d5d4
 5   00:00  0.53   c5xb4 c3xb4 d5d4 Rh8e8 Kc7d6
 6   00:00  0.29   c5xb4 c3xb4 a7a6 Rh8a8 Kc7b6 Ra8e8 d5d4
 7   00:00  0.29   c5xb4 c3xb4 d5d4 Rh8a8 Kc7b6 Ra8d8 Rh5h4
 8   00:00  0.30   c5xb4 c3xb4 Rh5h4 Rh8a8 Kc7b6 Ra8b8+ Kb6c6 Rb8c8+ Kc6d7
 9   00:00  0.30   c5xb4 c3xb4 d5d4 Rh8a8 d4d3 Ra8xa7+ Kc7d6 Kg1f1 Rh5f5 Ra7xh7
d3d2
10   00:00  0.27   c5xb4 c3xb4 d5d4 Rh8a8 d4d3 Ra8xa7+ Kc7c6 Kg1f1 Rh5f5 Ra7xh7
d3d2
11   00:00  0.27   c5xb4 c3xb4 d5d4 Rh8a8 d4d3 Ra8xa7+ Kc7c6 Kg1f1 Rh5e5 Ra7xh7
d3d2
11   00:00  0.38   c5xb4 c3xb4 d5d4 Rh8a8 d4d3 Ra8xa7+ Kc7c6 Kg1f1 Rh5e5 Ra7xh7
d3d2
12   00:01  0.43   c5xb4 c3xb4 d5d4 Rh8a8 d4d3 Ra8xa7+ Kc7c6 Kg1f1 Rh5e5 Ra7a3
d3d2 Ra3c3+ Kc6b6
13   00:01  0.49   c5xb4 c3xb4 d5d4 Rh8a8 d4d3 Ra8xa7+ Kc7c6 Ra7a6+ Kc6d5 Ra6a7
Kd5c4 Ra7d7 Rh5d5 Rd7xd5 Kc4xd5
14   00:14  0.03   c5xb4 c3xb4 Rh5h4 Kg1f1 Rh4xb4 Rh8xh7+ Kc7b6 Rh7g7 Rb4a4
Rg7xg6+ Kb6c5 a2a3 Ra4xa3 Kf1e2 b5b4 f2f3 b4b3
15   00:15  0.03   c5xb4 c3xb4 Rh5h4 Kg1f1 Rh4xb4 Rh8xh7+ Kc7b6 Rh7g7 Rb4a4
Rg7xg6+ Kb6c5 a2a3 Ra4xa3 Kf1e2 b5b4 f2f3 b4b3
15   00:16  0.12   c5xb4 c3xb4 Rh5h4 Kg1f1 Rh4xb4 Rh8xh7+ Kc7b6 Rh7g7 Rb4a4
Rg7xg6+ Kb6c5 a2a3 Ra4xa3 Kf1e2 b5b4 f2f3 b4b3
15   00:17  0.20   c5xb4 c3xb4 Rh5h4 Kg1f1 Rh4xb4 Rh8xh7+ Kc7b6 Rh7g7 Rb4a4
Rg7xg6+ Kb6c5 a2a3 Ra4xa3 Kf1e2 b5b4 f2f3 b4b3
16   00:48  0.10   c5c4 Kg1f1 Rh5h4 Rh8a8 d5d4 c3xd4 Rh4xd4 Ra8xa7+ Kc7b6 Ra7xh7
c4c3
17   01:45  0.00   c5c4 Kg1f1 Rh5h4 Kf1e2 d5d4 c3xd4 Rh4e4+
18   01:52  0.00   c5c4 Kg1f1 Rh5h4 Kf1e2 d5d4 c3xd4 Rh4e4+ Ke2f3 c4c3 Rh8xh7+
Kc7c8 Rh7h8+ Kc8d7 Rh8h7+ Kd7c8
19   02:32  0.00   c5c4 Kg1f1 Rh5h4 Kf1e2 d5d4 c3xd4 Rh4e4+ Ke2f3 c4c3 Rh8xh7+
Kc7c8 Rh7h8+ Kc8d7 Rh8h7+ Kd7c8



SmarThink  WB1 28 MB:
 6   00:00  0.61   d5d4 c3d4 c5d4 h8a8 d4d3 a8a7 c7d6 a2a4 d3d2
 6   00:00  0.72   d5d4 c3d4 c5d4 h8a8 d4d3 a8a7 c7d6 a2a4 d3d2
 7   00:00  0.73   d5d4 c3d4 c5d4 h8a8 d4d3 a8a7 c7c6 a7a8 d3d2 a8d8 h5d5
 7   00:00  0.72   d5d4 c3d4 c5d4 h8a8 d4d3 a8a7 c7c6 g1f1 h5d5 a2a4 d3d2 a4b5
c6b5
 8   00:00  0.72   d5d4 c3d4 c5d4 h8a8 d4d3 a8a7 c7d6 g1f1 h5d5 f1e1 h7h5 a7a6
 9   00:01  0.71   d5d4 c3d4 c5d4 g1f1 d4d3 f1e1
 9   00:01  0.38   d5d4 c3d4 c5b4 g1f1 a7a5 f1e2 c7d6 h8d8 d6e6 e2e3 h5d5 d8e8
e6d7 e8e5 d5e5
 9   00:02  0.39   c5b4 c3b4 h5h4 h8a8 h4b4 a8a7 c7b6 a7h7 b4b1 g1h2 b1a1 a2a4
a1a4 h2g3 b6c5
 9   00:02  0.52   c5b4 c3b4 h5h4 g1f1 h4b4 h8h7 c7b6 h7d7 b4b1 f1e2 b1b2 e2e3
b2a2 d7d5 a7a5 d5d6
10   00:03  0.51   c5b4 c3b4 h5h4 g1f1 h4b4 h8h7 c7b6 h7d7 b4b1 f1e2 b1b2 e2e3
b2a2 d7d5 a7a5 d5d6
10   00:04  0.37   c5b4 c3b4 h5h4 g1f1 h4b4 h8h7 c7b6 h7d7 b4b1 f1e2 b1b2 e2e3
b2a2 d7d5 a7a5 d5d6 b6b7
11   00:08  0.36   c5b4 c3b4 h5h4 a2a3 d5d4 g1f1 d4d3 f1e1
11   00:10  0.22   c5b4 c3b4 h5h4 a2a3 d5d4 g1f1 c7d6 f1e2 d6d5 h8d8 d5c4 d8c8
c4b3 c8c5 a7a6
11   00:10  0.23   d5d4 c3d4 c5b4 g1f1 a7a5 f1e2
11   00:11  0.23   d5d4 c3d4 c5b4 g1h2 c7c6 g2g4 h5h6 h8c8 c6d5 c8c5 d5d4 c5b5
d4c4 b5a5
12   00:16  0.22   d5d4 c3d4 c5b4 g1h2 c7c6 g2g4 h5h6 h8c8 c6d5 c8c5 d5d4 c5b5
d4c4 b5a5 c4d3 a5a7
12   00:18  0.22   d5d4 c3d4 c5b4 g1h2 c7b6 g2g4 h5d5 h8h7 d5d4 h7g7 d4d6 h2g3
a7a6 f2f4
13   00:36  0.21   d5d4 c3d4 c5b4 g1h2 c7b6 g2g4 h5d5 h8h7 d5d4 h7g7 d4d6 h2g3
a7a6 f2f4
13   01:00  0.12   d5d4 c3d4 c5b4 g1h2 c7b6 g2g4 h5d5 h8h7 d5d4 h7g7 d4d6 h2g3
a7a5
14   03:01  0.13   d5d4 c3d4 c5b4 g1h2 c7b6 g2g4 h5d5 h8h7 d5d4 h7g7 d4d6 h2g3
a7a5






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