Author: Stefan Meyer-Kahlen
Date: 02:44:52 06/19/00
Go up one level in this thread
On June 18, 2000 at 07:14:20, Gian-Carlo Pascutto wrote:
>
>Hi all
>
>At the bottom of this post is a test position. The idea is not to check which
>programs find the correct move (should be easy), but when the program first
>spots it, with which score, when it fails high, how long it takes for the
>fail-high to resolve and what score it gets back.
>
>The idea is to see how well the programs handle this kind of positions where
>the extensions suddenly can get wild, just when the alpha-beta window opens.
>Some can handle this very well, other have the search totally blow up...
>
>I've done a bit of testing already, and the results vary rather widely...so
>I'd like to get as much data as possible on this one. If you are a programmer
>yourself, _please_ indicate what extensions your program uses, or other
>relevant info about your search. I'd like to get an idea of the do's/dont's
>when extending.
>
>Also, if anyone has other positions like this (preferrably even harder/worse),
>please share them.
>
>[D] rr4k1/pp2pp1p/q2p2p1/2pP3n/2P5/2BQP2R/PP3P2/2K4R w - - 0 19
>
>PS. Is this a forced mate? If so, how many moves exactly?
>
>--
>GCP
This is Shredder 4.18 on a PII-450, I'd like to see the whole line with +M18 to
see weather Shredder just counted wrong or if this really was a mate in 18.
Stefan
8.01 0:01 -0.29++ 1.Rxh5 gxh5 2.Rxh5 Kf8 3.Qxh7 Ke8 4.Qf5 Kd8 5.Qxf7 e5
6.Rh8+ (184.319) 92.9
8.01 0:03 +1.36 1.Rxh5 gxh5 2.Rxh5 Kf8 3.Qxh7 Ke8 4.Qf5 Kd8 5.Qxf7 Qa4
6.Rh8+ Kc7 7.Qxe7+ Qd7 8.Qxd7+ Kxd7 (347.779) 100.7
8 -> 0:03 +1.36 1.Rxh5 gxh5 2.Rxh5 Kf8 3.Qxh7 Ke8 4.Qf5 Kd8 5.Qxf7 Qa4
6.Rh8+ Kc7 7.Qxe7+ Qd7 8.Qxd7+ Kxd7 (349.359) 100.2
9.01 0:04 +1.61++ 1.Rxh5 gxh5 2.Rxh5 Kf8 3.Rxh7 Ke8 4.Qf5 Kd8 5.Qxf7 Qxa2
6.Rh8+ Kc7 7.Qxe7+ Kb6 8.Qxd6+ (505.605) 104.0
9.01 0:05 +2.11++ 1.Rxh5 gxh5 2.Rxh5 Kf8 3.Rxh7 Ke8 4.Qf5 Kd8 5.Qxf7 b5
6.Qxe7+ Kc8 7.Rh8+ (565.997) 104.6
9.01 0:10 +7.89 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Qe4 Qxa2 4.Bf6 Qa1+ 5.Kc2 Qa4+
6.Kb1 e5 7.dxe6 fxe6 8.Qxe6+ Kf8 9.Qxd6+ Ke8 10.Qxc5
(1.100.315) 104.3
9 -> 0:10 +7.89 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Qe4 Qxa2 4.Bf6 Qa1+ 5.Kc2 Qa4+
6.Kb1 e5 7.dxe6 fxe6 8.Qxe6+ Kf8 9.Qxd6+ Ke8 10.Qxc5
(1.104.473) 104.5
10.01 0:18 +8.14++ 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Qe4 Qxa2 4.Bf6 Qa1+ 5.Kc2 Qa4+
6.Kb1 e5 7.dxe6 Qd7 8.exf7+ Kf8 9.Qxg6 (1.896.283) 100.3
10.01 0:25 +8.64++ 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Qe4 Qxa2 4.Bf6 Qa1+ 5.Kc2 Qa4+
6.Kb1 e5 7.dxe6 Rd8 8.Bxd8 Rxd8 9.exf7+ Kf8
(2.592.259) 100.8
10.01 0:42 +16.44 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Qe4 Qxc4 4.Qxc4 Kd7 5.Rxf7 b6
6.Qe4 Kc7 7.Qxg6 (4.401.682) 102.7
10 -> 0:42 +16.44 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Qe4 Qxc4 4.Qxc4 Kd7 5.Rxf7 b6
6.Qe4 Kc7 7.Qxg6 (4.407.930) 102.8
11.01 1:09 +16.69++ 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Qe4 Qxc4 4.Qxc4 Kd7 5.Rxf7 b6
6.Qe4 g5 7.Qxe7+ (7.261.695) 104.7
11.01 1:25 +17.19++ 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Qe4 Qxc4 4.Qxc4 Kd7 5.Rxf7 b6
6.Qe4 Kc8 7.Rh8+ Kb7 8.Rxe7+ (8.890.564) 103.6
11.01 1:37 +M18 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Qe4 Qa4 4.Rxf7 Qd1+ 5.Kxd1 b6
6.Rxe7+ (10.548.042) 108.4
11 -> 1:37 +M18 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Qe4 Qa4 4.Rxf7 Qd1+ 5.Kxd1 b6
6.Rxe7+ (10.554.419) 108.4
12.01 2:18 +M8 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Rxf7 Qxc4 4.Qxc4 Kxf7 5.Rh7+ Ke8
6.Qe4 Kf8 7.Qxg6 b5 8.Qf7# (17.631.630) 127.3
12 -> 2:18 +M8 1.Rxh5 Kf8 2.Rxh7 Ke8 3.Rxf7 Qxc4 4.Qxc4 Kxf7 5.Rh7+ Ke8
6.Qe4 Kf8 7.Qxg6 b5 8.Qf7# (17.641.265) 127.2
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