Author: Kurt Utzinger
Date: 12:27:39 03/26/03
Go up one level in this thread
On March 26, 2003 at 06:28:52, Peter Berger wrote:
>These can be tough or very easy depending on engine - some engines seem to know
>too much here. They are also interesting for humans I think.
>
>[D]6k1/p4p2/6p1/1P2p2p/4q2P/4Q1P1/P4P2/6K1 b - - 0 1
>
>1..Qxe3! wins for black.
Hi Peter
Do you really think that in these positons it is a matter of knowledge
for chess programs? I doubt and assume it's simply a matter of search and
calculation. We can see this from analysis with Rebel 12 Beta1. In the first
position it's easy to see for the program that white will lose a pawn. In
the second position, Rebel needs 9m2s to come to a slightly negative
evaluation for ... Qxe3?
>
>
>The second one is also interesting:
>
>[D]6k1/p4p2/6p1/1P2p2p/4q2P/4Q1P1/P4P2/5K2 b - - 0 1
>
>1..Qxe3?? loses for black.
>
>Source: Blitzgame Yace-Crafty,D. Bürßner,A. Williams - ICC discussion
Thinking....
+---+---+---+---+---+---+---+---+ Pos 1 - End 1
8 | | | | | | | *K| |
+---+---+---+---+---+---+---+---+ 00:00:00 00:00:00
7 | *p| | | | | *p| | |
+---+---+---+---+---+---+---+---+
6 | | | | | | | *p| | Time infinite
+---+---+---+---+---+---+---+---+ Hash 28 Mb
5 | | p | | | *p| | | *p| Engine Beta 1
+---+---+---+---+---+---+---+---+ Personality beta1.eng
4 | | | | | *Q| | | p | anti-GM Off
+---+---+---+---+---+---+---+---+ Tactics Off
3 | | | | | Q | | p | | Bluff Chess Off
+---+---+---+---+---+---+---+---+ Style Normal
2 | p | | | | | p | | | Strength Strongest
+---+---+---+---+---+---+---+---+ Search Nullmove
1 | | | | | | K | | |
+---+---+---+---+---+---+---+---+ 1.. Kg1-f1
a b c d e f g h
6k1/p4p2/6p1/1P2p2p/4q2P/4Q1P1/P4P2/5K2 b - -
[Event "?"]
[Site "?"]
[Date "??.??.????"]
[Round "?"]
[White "Pos 1"]
[Black "End 1"]
[Result "*"]
[WhiteElo "?"]
[BlackElo "?"]
[FEN "6k1/p4p2/6p1/1P2p2p/4q2P/4Q1P1/P4P2/5K2 w - - 0 1"]
1.Kf1 *
00:00:00 1.00 0.16 1..Qxe3 2.fxe3
00:00:00 2.00 0.18 1..Qxe3 2.fxe3
00:00:00 3.00 0.17 1..Qxe3 2.fxe3 f5 3.a4 Kf7 4.a5 Ke6
5.Ke2 (0)
00:00:00 4.00 0.17 1..Qxe3 2.fxe3 f5 3.a4 Kf7 4.a5 Ke6
5.Ke2 (0)
00:00:00 5.00 0.12 1..Qxe3 2.fxe3 f5 3.a4 Kg7 4.a5 Kf7
5.Ke2 Ke6 6.Kd3 Kd5 (0)
00:00:00 6.00 0.12 1..Qxe3 2.fxe3 f5 3.a4 Kg7 4.a5 Kf7
5.Ke2 Ke6 6.Kd3 Kd5 (0)
00:00:00 7.00 0.15 1..Qxe3 2.fxe3 Kf8 3.Ke2 Ke7 4.a4 Ke6
5.a5 Kd5 6.Kd2 f5 7.Kd3 e4 8.Kc3 (0)
00:00:00 8.00 0.15 1..Qxe3 2.fxe3 Kf8 3.Ke2 Ke7 4.a4 Ke6
5.a5 Kd5 6.Kd2 f5 7.Kd3 e4 8.Kc3 (0)
00:00:01 9.00 0.12 1..Qxe3 2.fxe3 Kf8 3.Ke2 Ke7 4.Kd3 Ke6
5.e4 f6 6.a4 Kd6 7.Kc4 Ke6 (0)
00:00:02 10.00 0.14 1..Qxe3 2.fxe3 Kf8 3.Ke2 e4 4.a4 Ke7
5.a5 Kd6 6.Ke1 Ke6 7.Kf2 f6 8.Kg2 Kd5 (2)
00:00:04 11.00 0.26 1..Qxe3 2.fxe3 Kf8 3.Ke2 e4 4.a4 Ke7
5.Kd2 Kd6 6.Kc2 Kc5 7.Kc3 f6 8.Kb3 f5
9.Kc3 Kd5 10.Kb4 Ke5 11.a5 (4)
00:00:08 12.00 0.26 1..Qxe3 2.fxe3 Kf8 3.Ke2 e4 4.a4 Ke7
5.Kd2 Kd6 6.Kc2 Kc5 7.Kc3 f6 8.Kb3 f5
9.Kc3 Kd5 10.Kb4 Ke5 11.a5 (8)
00:00:22 13.00 0.00 1..Qxe3 2.fxe3 Kf8 3.Ke2 f5 4.Kd3 Kf7
5.a4 Ke6 6.Kc3 Kd5 7.Kd3 e4 8.Kc3 Kc5
9.Kb3 Kd5 10.Kc3 Kc5 11.Kb3 Kd5 (18)
00:01:56 14.00 0.00 1..Qxe3 2.fxe3 Kf8 3.Ke2 f5 4.Kd3 Kf7
5.a4 Ke6 6.Kc3 Kd5 7.Kb2 Kc4 8.Ka3 (116)
00:09:02 15.00 -0.15 1..Qxe3 2.fxe3 Kf8 3.Ke2 Ke7 4.Kd3 Ke6
5.Kc4 f6 6.a3 g5 7.a4 Kd6 8.a5 g4 9.e4 (531)
Positions : 492.018.626
Nodes per second : 709.983
Extensions (checks) : 0 (0%)
Extensions (captures) : 0 (0%)
Extensions (king safety) : 0 (0%)
Extensions (on depth) : 0 (0%)
Extensions (remaining) : 0 (0%)
Extensions (total) : 0 (0%)
Hash Table : 44.965.398 22.109.975 (100%)
Average depth : 20
Deepest depth : 45
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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