Hi,
Hope you can read the position below. As you can see GNU makes a big misstep on
0-ply evaluation. GNU:s choice loses about 80% gammons instead of a normal
gammon saving move that would lose about 40% gammon. GNU corrects itself on
1-ply and higher levels, so it might have no or small practical importance.
However it bothers me as I often use 0-ply when doing rollouts. So I'm curious
if anyone with inight in the neural nets might have some explanation or comment.
Kind regards
Sven-Olav Norén, Stockholm Sweden
2wIAAKuzqgIAAA:MIGpAAAAAAAA
The score (after 0 games) is: gnubg 0, snoren 0 (match to 5 points)Match
Information:
Date: 2008-11-10Move number 3: gnubg to play 32
GNU Backgammon Position ID: 2wIAAKuzqgIAAA Match ID :
MIGpAAAAAAAA +12-11-10--9--8--7-------6--5--4--3--2--1-+ O: gnubg | O O O
O O O | | O O O O O | 0 points | | | O O
O | Rolled 32 | | | O | |
| | | | | |
| ^| |BAR| | 5 point match (Cube:
1) | | | | X | | |
| X | | | | XX |
| | X X X | XX | | | X X X X
| XX 0 points +13-14-15-16-17-18------19-20-21-22-23-24-+ X: snorenPip
counts: O 88, X 16
Rolled 32: 1. Cubeful 0-ply 4/2 4/1 Eq.: -1,407
0,000 0,000 0,000 - 1,000 0,433 0,000 2. Cubeful 0-ply 9/6 8/6
Eq.: -1,432 ( -0,025) 0,000 0,000 0,000 - 1,000 0,459
0,000 3. Cubeful 0-ply 9/6 7/5 Eq.: -1,443 (
-0,036) 0,000 0,000 0,000 - 1,000 0,471 0,000 4. Cubeful 0-ply
12/10 9/6 Eq.: -1,446 ( -0,040) 0,000 0,000 0,000 -
1,000 0,475 0,000 5. Cubeful 0-ply 12/9 8/6 Eq.:
-1,471 ( -0,065) 0,000 0,000 0,000 - 1,000 0,501 0,000
Output generated Mon Nov 10 13:29:07 2008by GNU Backgammon 0.90-mingw (Text
Export version 1.91)
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