Author: Robert Hyatt
Date: 05:21:43 10/01/98
Go up one level in this thread
On October 01, 1998 at 01:11:12, blass uri wrote:
>
>
>
>8/1r5p/6p1/8/P2k4/K6P/1R4P1/8 black to move
>
>Many programs are playing Rxb2 because they computes that white is losing its
>pawn in the pawn endgame and do not understand that after Rxb2 Kxb2 Kc4 Kc2 Kb4
>Kd3 Kxa4 white is winning.
>
>Rxb2 is not the first move they want to play because they need time to see that
>black wins a pawn by this stupid mistake after Rxb2 Kxb2 Kc4 Ka3
>
>Is there a program that understand by static evaluation that white is winning
>with the king at d3?(static evaluation at least 1.5 pawn advantage for white)
>
>Uri
I get this:
+---+---+---+---+---+---+---+---+
8 | | | | | | | | |
+---+---+---+---+---+---+---+---+
7 | | *R| | | | | | *P|
+---+---+---+---+---+---+---+---+
6 | | | | | | | *P| |
+---+---+---+---+---+---+---+---+
5 | | | | | | | | |
+---+---+---+---+---+---+---+---+
4 | P | | | *K| | | | |
+---+---+---+---+---+---+---+---+
3 | K | | | | | | | P |
+---+---+---+---+---+---+---+---+
2 | | R | | | | | P | |
+---+---+---+---+---+---+---+---+
1 | | | | | | | | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
Black(1): sc
end-game phase
clearing hash tables
note: scores are for the white side
material evaluation................. 1.00
development......................... 0.00
pawn evaluation..................... 0.12
passed pawn evaluation.............. 0.24
passed pawn race evaluation......... 0.00
interactive piece evaluation........ -0.23
total evaluation.................... 1.13
when I do a search, I never get "rxb2" as reasonable:
depth time score variation (1)
starting thread 1
starting thread 2
starting thread 3
1 0.01 -2.92 1. ... Rxb2 2. Kxb2
1 0.01 ++ 1. ... Rc7!!
1 0.01 -2.04 1. ... Rc7
1-> 0.02 -2.04 1. ... Rc7
2 0.02 -2.39 1. ... Rc7 2. a5
2 0.02 -2.31 1. ... Ra7 2. Kb4
2-> 0.03 -2.31 1. ... Ra7 2. Kb4
3 0.03 -2.29 1. ... Ra7 2. Rb4+ Ke3 3. Kb3
3-> 0.04 -2.29 1. ... Ra7 2. Rb4+ Ke3 3. Kb3
4 0.04 -2.29 1. ... Ra7 2. Rb4+ Ke3 3. Rb3+ Ke4
4. Kb4
4-> 0.06 -2.29 1. ... Ra7 2. Rb4+ Ke3 3. Rb3+ Ke4
4. Kb4
5 0.08 -2.27 1. ... Ra7 2. Rb4+ Kc3 3. h4 h6 4.
g4
5-> 0.10 -2.27 1. ... Ra7 2. Rb4+ Kc3 3. h4 h6 4.
g4
6 0.26 -2.34 1. ... Ra7 2. Rb8 Kc3 3. g4 h5 4. g5
6-> 0.30 -2.34 1. ... Ra7 2. Rb8 Kc3 3. g4 h5 4. g5
7 0.41 -2.31 1. ... Ra7 2. Rb8 Kc3 3. g4 h5 4. gxh5
gxh5 5. h4
7-> 0.48 -2.31 1. ... Ra7 2. Rb8 Kc3 3. g4 h5 4. gxh5
gxh5 5. h4
8 1.54 -2.31 1. ... Ra7 2. g3 Ra6 3. Rb4+ Ke3 4.
Kb3 Kd3 5. Rb5 h6
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