Author: Dan Newman
Date: 07:06:52 10/22/00
Go up one level in this thread
On October 21, 2000 at 05:28:14, Uri Blass wrote:
>I composed this position to see if chessmaster can see perpetual check.
>
>[D]4k3/6RQ/6PP/8/r7/8/r7/7K b - - 0 1
>
>The target is to see 0.00 score
>
>I found that chessmaster does not see the draw even after some minutes but after
>Ra1+ Kg2 it can see the draw very quickly in clearly smaller depth.
>
>The same after Ra1+ Kh2
>
>I tried also Fritz5.32 and it does not see the draw at least after a short time.
>
>If I give Fritz5.32 the moves Ra1+ Kg2 it can see the draw but after Ra1+ Kh2
>it has problems to see the draw.
>
>Fritz5.32 expects Kg2 when it plays Ra1+ and wants to play Kg2 at depth 13 with
>evaluation 0.00.
>
>How many squares can the white king visit before the repetition?(it is clear
>that the white king cannot visit all the 21 squares (b1-b3... h1-h3))
>
>Uri
Shrike finds the draw in just under 2 seconds on a slightly overclocked
P3/933 (980 MHz):
10> -971 0.74 552430 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Kf1 Ra1+ Kf2
Ra2+ Ke3 Ra3+ Kd2 Rd4+ Kc2 Rc4+ Kd2
11. -975 1.17 937444 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Kf1 Ra1+ Kf2
Ra2+ Ke3 Ra3+ Kd2 Ra2+ Kc3 Ra3+ Kb2 Re3 Qg8+
11> -975 1.44 1211647 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Kf1 Ra1+ Kf2
Ra2+ Ke3 Ra3+ Kd2 Ra2+ Kc3 Ra3+ Kb2 Re3 Qg8+
12. -965 1.56 1340021 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Kf1 Ra1+ Kf2
Ra2+ Ke3 Ra3+ Kd2 Ra2+ Kc3 Ra3+ Kc2 Rc4+ Kb2
Ra4
12> -965 1.78 1574954 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Kf1 Ra1+ Kf2
Ra2+ Ke3 Ra3+ Kd2 Ra2+ Kc3 Ra3+ Kc2 Rc4+ Kb2
Ra4
13+ -941 1.78 1576406 Ra1+
13. 0 1.97 1839027 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Ke3 Ra3+ Kd2
Ra2+ Kc3 Ra3+ Kb2 Ra2+ Kb3 Ra3+ Kc2 Ra2+ Kb3
<TPR draw>
13> 0 2.18 2127415 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Ke3 Ra3+ Kd2
Ra2+ Kc3 Ra3+ Kb2 Ra2+ Kb3 Ra3+ Kc2 Ra2+ Kb3
<TPR draw>
14. 0 2.42 2461897 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Ke3 Ra3+ Kd2
Ra2+ Kc3 Ra3+ Kb2 Ra2+ Kb3 Ra3+ Kc2 Ra2+ Kb3
<TPR draw>
14> 0 2.80 2976546 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Ke3 Ra3+ Kd2
Ra2+ Kc3 Ra3+ Kb2 Ra2+ Kb3 Ra3+ Kc2 Ra2+ Kb3
<TPR draw>
15. 0 3.26 3616659 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Ke3 Ra3+ Kd2
Ra2+ Kc3 Ra3+ Kb2 Ra2+ Kb3 Ra3+ Kc2 Ra2+ Kb3
<TPR draw>
15> 0 3.87 4447839 Ra1+ Kg2 Ra2+ Kf3 Ra3+ Ke2 Ra2+ Ke3 Ra3+ Kd2
Ra2+ Kc3 Ra3+ Kb2 Ra2+ Kb3 Ra3+ Kc2 Ra2+ Kb3
<TPR draw>
-Dan.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.