Author: Colin Frayn
Date: 17:23:16 04/07/00
Go up one level in this thread
On April 07, 2000 at 01:47:44, Will Singleton wrote:
>This occurred in a game tonight on ICC. A program that considers king position
>and pawn majorities should be able to solve it quickly (mine doesn't). Might be
>a good test position for amateur programs. The winning move appears to be hxg4.
>
>[D]8/1p1k4/8/1Pp2p2/2P2Ppp/P3K2P/8/8 w - - 0 45
I ran ColChess on this for quite some time. The (defintive, accurate) analysis
is below.
(Please excuse the thinking times... no pawn extensions and no guesswork
algorithms)
..and yes, that _was_ 1/8 of a billion nodes at 20 ply :)
Current Position
----------------
. . . . . . . .
. p . k . . . . pP=Pawn
. . . . . . . . rR=Rook
. P p . . p . . nN=Knight lower=Black
. . P . . P p p bB=Bishop CAPS=White
P . . . K . . P qQ=Queen
. . . . . . . . kK=King
. . . . . . . .
[1]W:>comp
Thinking [7 Moves]
Current Position=-0.14
{L2} :::. E3 - F2 (-2.27) Nodes=101 Eval=45 [0.01s]
{L3} :::. E3 - F2 (-2.77) Nodes=257 Eval=130 [0.01s]
{L4} :::. E3 - F2 (-2.96) Nodes=614 Eval=223 [0.02s]
{L5} :::. H3 x G4 (-1.00) Nodes=3242 Eval=1801 [0.06s]
{L6} :::. H3 x G4 (-1.22) Nodes=4354 Eval=1696 [0.10s]
{L7} :::. H3 x G4 (-1.03) Nodes=7114 Eval=3178 [0.17s]
{L8} :::. E3 - F2 (-1.19) Nodes=44204 Eval=18588 [0.62s]
{L9} :::. E3 - F2 (-1.14) Nodes=36371 Eval=16058 [0.98s]
{L10} :::. E3 - F2 (-1.14) Nodes=67146 Eval=24331 [1.52s]
{L11} :::. E3 - F2 (-1.14) Nodes=90616 Eval=35388 [2.33s]
{L12} :::. E3 - F2 (-1.14) Nodes=172071 Eval=57921 [3.66s]
{L13} :::. A3 - A4 (-1.15) Nodes=848157 Eval=355282 [11.97s]
{L14} :::. A3 - A4 (-1.15) Nodes=725651 Eval=214735 [17.39s]
{L15} :::. A3 - A4 (-1.15) Nodes=662658 Eval=225873 [23.25s]
{L16} :::. H3 x G4 (-0.36) Nodes=7169806 Eval=3023056 [91.57s]
{L17} :::. A3 - A4 (-1.15) Nodes=10164383 Eval=4261553 [197.8s]
{L18} :::. H3 x G4 (0.08) Nodes=77122057 Eval=39094439 [5502s]
{L19} :::. H3 x G4 (-0.60) Nodes=22456689 Eval=8064228 [5768s]
{L20} :::. H3 x G4 (0.90) Nodes=125453830 Eval=49517030 [3163s]
PV : h3g4 f5g4 b5b6 h4h3 e3f2 d7c6 f4f5 h3h2 f2g2 g4g3 a3a4 c6d7 a4a5 d7c8
f5f6 c8d8 f6f7 d8e7 a5a6 b7a6
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