Author: Christophe Theron
Date: 21:45:53 04/28/02
Go up one level in this thread
On April 28, 2002 at 18:27:36, Dadi Jonsson wrote:
>On April 28, 2002 at 18:16:20, Christophe Theron wrote:
>
>>On April 28, 2002 at 16:53:14, Gian-Carlo Pascutto wrote:
>>
>>>[D]r4k2/1p2q2p/1Q2bp1P/rP2p1p1/P2pP3/2bP2P1/3N1PBK/R1R5 b - - 0 29
>>>
>>>Avoid mode : Bxa1
>>>
>>>27 seconds to fail low for Sjeng, 57 to find a new move.
>>
>>
>>On what processor running at what speed?
>>
>>If you forget to mention it, then you'd better not mention any time...
>>
>>The current version of Chess Tiger running on my laptop PII-233MHz (48Mb hash)
>>changes its mind for R5a7 in 957 seconds. But it has a fail low much earlier, in
>>90 seconds, so it would need 90s to see the problem and to decide to extend its
>>thinking time in search of a better move.
>>
>>957s on my computer must be something like 148 seconds on an Athlon 1.5GHz
>>(correct me if I'm wrong).
>>
>>90s on my laptop is like 14 seconds on an Athlon 1.5GHz.
>>
>>An Athlon 1.5GHz is approximately as fast as the P4-2.2GHz used in the game.
>>
>>So I believe that the new Chess Tiger would not blunder in the same position...
>>
>>I think the reason why Gambit Tiger 2.0 played the losing Bxa1 is that it failed
>>to see some deep mate threats. The new Chess Tiger is better in this regard.
>>
>>
>>
>> Christophe
>
>Analysis by Tiger 14.0 on an AMD 1400Mhz:
>
>[-3.38] d=9 29...Bxa1 30.Rxa1 Rxa4 31.Rc1 Rc8 32.Rxc8+ Bxc8 33.Nc4 Ra2 34.Nd6
>Bg4 (0:00.00)
>[-3.16] d=10 29...Bxa1 30.Rxa1 Rxa4 31.Rc1 Rc8 32.Rxc8+ Bxc8 33.Nb3 Ra2
>34.Qc5 Qxc5 35.Nxc5 Rxf2 (0:00.00)
>[-2.98] d=11 29...Bxa1 30.Rxa1 Rxa4 31.Rc1 Rc8 32.Rxc8+ Bxc8 33.Nc4 Be6
>34.Nd6 Ra3 35.Nxb7 Rxd3 36.Qd8+ Qxd8 37.Nxd8 (0:00.01)
>[-2.98] d=12 29...Bxa1 30.Rxa1 Rxa4 31.Rc1 Rc8 32.Rxc8+ Bxc8 33.Nc4 Bg4
>34.Nd6 Ra3 35.Nxb7 Rxd3 36.Qc6 Ra3 (0:00.04)
>[-2.62] d=13 29...Bxa1 30.Rc7 Qd8 31.Nc4 Rxa4 32.Rxh7 Qxb6 33.Nxb6 Kg8
>34.Rg7+ Kh8 35.Rg6 Bc3 36.Rxf6 Bb3 37.Nxa8 Rxa8 (0:00.21)
>[-2.62] d=14 29...Bxa1 30.Rc7 (0:00.36)
>[-2.18] d=15 29...R5a7 30.Rxc3 dxc3 31.Nb1 Rxa4 32.Rxa4 Rxa4 33.Nxc3 Ra3
>34.Bh3 Bf7 35.Nd5 Bxd5 36.exd5 Rxd3 (0:07.38)
>[-2.10] d=16 29...R5a7 30.a5 Bxa5 31.Rxa5 Rxa5 32.Rc7 Rxb5 33.Rxe7 Rxb6
>34.Rxh7 Ra2 35.Rc7 Kg8 36.Nc4 Bxc4 37.Rxc4 Rxf2 (0:17.50)
>[-2.30] d=16 29...g4 30.Rxc3 dxc3 31.Nb1 c2 32.Nc3 Qf7 33.Rc1 Qh5+ 34.Kg1
>Qxh6 35.Rxc2 Bb3 36.Qc5+ Kg8 37.Re2 Qg5 38.Kh2 Bxa4 (0:22.47)
>[-2.24] d=17 29...g4 30.Rxc3 dxc3 31.Nb1 c2 32.Nc3 Qf7 33.Rc1 Qh5+ 34.Kg1
>Qxh6 35.Rxc2 Bb3 36.Qc5+ Kg8 37.Re2 Qg7 38.Qd6 Bxa4 (0:29.23)
OK so apparently CT15 can see the problem one ply earlier, which makes a hell of
a difference here.
Christophe
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