|
From: | Ned Cross |
Subject: | [Bug-gnubg] Bug in analysis - position enclosed |
Date: | Mon, 28 Oct 2002 12:33:06 -0800 |
GNU build: 021022
OS: Win ME
Bug: Analysis
discontinuity
GNU exhibits strange behavior in this
post-ace-point game position.
1) GNU rates my move (completing the
closeout) as a -.138 "bad move", giving an evaluation of 73.0%
wins.
2) THEN, GNU rates the resulting position,
in the next move pane, as a proper double/pass with an evaluation of 82.8% wins.
As a very colorful character I once knew
would say: "How can this be?!!"
Ned
__________________________
Move number 36: X to play 54
GNU Backgammon Position ID:
bhsAALHtDkQAAQ
Match ID : cInyABAAIAAA +13-14-15-16-17-18------19-20-21-22-23-24-+ O: GNUfish | X | | O O O O X | O 1 point | | | O O O O | O | | | O | O | | | | O | | | | O v| |BAR| | 7 point match (Cube: 1) | | | | | | | | | | | X X | | | | X X X X X | Rolled 54 | X | | X X X X X O | 4 points +12-11-10--9--8--7-------6--5--4--3--2--1-+ X: Ned * Ned moves 6/1* 5/1
Cube analysis
2-ply cubeless equity +0.293 (Money: +0.289) 0.679 0.000 0.000 - 0.321 0.067 0.002 1. No double +0.440 2. Double, pass +1.000 ( +0.560) 3. Double, take +0.275 ( -0.165) Proper cube action: No double, take (22.8%) Alert: bad move ( -0.138) Rolled 54
(+0.214):
1. Cubeful 2-ply 24/19 5/1* Eq.: +0.827 0.774 0.000 0.000 - 0.226 0.067 0.004 * 2. Cubeful 2-ply 6/1* 5/1 Eq.: +0.689 ( -0.138) 0.730 0.000 0.000 - 0.270 0.012 0.000 3. Cubeful 1-ply 24/15 Eq.: +0.341 ( -0.486) 0.621 0.000 0.000 - 0.379 0.043 0.001 4. Cubeful 0-ply 24/19 12/8 Eq.: +0.359 ( -0.468) 0.672 0.000 0.000 - 0.328 0.083 0.002 5. Cubeful 0-ply 24/19 15/11 Eq.: +0.352 ( -0.475) 0.671 0.000 0.000 - 0.329 0.086 0.002 6. Cubeful 0-ply 12/7 5/1* Eq.: +0.309 ( -0.518) 0.666 0.000 0.000 - 0.334 0.096 0.007 Move number 37: X doubles to 2 GNU Backgammon Position ID:
bhsAANq2DUQAAQ
Match ID : cBHgABAAIAAA +13-14-15-16-17-18------19-20-21-22-23-24-+ O: GNUfish | X | O | O O O O X | O 1 point | | | O O O O | O Cube offered at 2 | | | O | O | | | | O | | | | O v| |BAR| | | | | | | | | | | | | | | | | X X X X X X | | X | | X X X X X X | 4 points +12-11-10--9--8--7-------6--5--4--3--2--1-+ X: Ned * GNUfish rejects
Cube analysis 2-ply cubeless equity +0.653 (Money: +0.653) 0.828 0.000 0.000 - 0.172 0.003 0.000 1. Double, pass +1.000 2. Double, take +1.255 ( +0.255) 3. No double +0.931 ( -0.069) Proper cube action: Double, pass Ned wins 1 point |
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