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[Bug-gnubg] MET and extrapolation bug ?
From: |
Øystein Johansen |
Subject: |
[Bug-gnubg] MET and extrapolation bug ? |
Date: |
Sun, 15 Dec 2002 14:08:05 +0100 |
GNU Backgammon Position ID: Zg74CRCzmcGAJA
Match ID : cAlgAnAAGAAA
+24-23-22-21-20-19------18-17-16-15-14-13-+ O: GNU Backgammon
| X O X O X O | | X | 7 points
| O O O | | X |
| O | | |
| | | |
| | | |
| |BAR| |v 19 point match (Cube: 1)
| | | 6 |
| | | O |
| | | O |
| X X X X | | X O | On roll
| X O X X X | | X O O | 3 points
+-1--2--3--4--5--6-------7--8--9-10-11-12-+ X: Oystein
Hi,
The above position was posted to GammOnLine some days ago. As Albert replies
in one of his posts:
If a MET up to 15 is used, and GNU will use extrapolation from further scores,
the 2-ply evaluation says Double/Take. If I use Jacobs table, which goes to
25-away, GNU evaluates the position as a clear pass.
Please look at the numbers as the difference is so high that I suspect there
is a bug somewhere. ( Maybe a bug in the extrapolation algorithm? )
-Øystein
- [Bug-gnubg] MET and extrapolation bug ?,
Øystein Johansen <=