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From: | Jim Blue |
Subject: | [Bug-gnubg] Incorrect equities calculated |
Date: | Thu, 7 Aug 2003 15:16:48 -0400 |
In the saved position below, the equities
at 2-ply and roll-out are reasonable, in the neigherborhood of -.5, but at
3-ply they all come out to be -1. (I set up this position by editing it, not in
the course of a game, in case that matters.)
My settings for both Analysis and
Evaluation are World Class, 2 plies, no reduction, cubeful, 0 noise, move filter
normal.
----------
GnuBG (O, 0 pts) vs. Jim (X, 0 pts) (Match
to 3)
Game number 1
Match Information:
GnuBG's rating: n/a
Jim's rating: n/a Date: August 07, 2003 Event: n/a Round: n/a Place: n/a Annotator: n/a Comments: n/a Move number 4: X to play 15 GNU Backgammon
Position ID:
7LwDBwC03YQBAw
Match ID : cIl0AAAAAAAA +24-23-22-21-20-19------18-17-16-15-14-13-+ O: GnuBG | O O X O | | O X | 0 points | O O X O | | O X | | O O | | O | | O | | | | | | | | |BAR| |v 3 point match (Cube: 1) | | | | | | | | | X | | O | | X X X | | X O | Rolled 15 | X X X X | | X X O | 0 points +-1--2--3--4--5--6-------7--8--9-10-11-12-+ X: Jim Pip counts: O 102, X 128 Cube analysis
2-ply cubeless equity -0.488 (Money: -0.480) 0.266 0.013 0.000 - 0.734 0.025 0.001 Cubeful equities: 1. No double -0.933 2. Double, pass +1.000 ( +1.933) 3. Double, take -2.372 ( -1.439) Proper cube action: No double, take (42.7%) Rolled 15: 1.
Rollout 7/6
7/2
Eq.: -0.532
0.240 0.011 0.000 - 0.760 0.018 0.001 CL -0.532 [0.002 0.001 0.000 - 0.002 0.001 0.000 CL 0.005] Truncated cubeless rollout (depth 11) (trunc. at one-sided bearoff) with var.redn. 108 games, Mersenne Twister dice gen. with seed 1176041872 and quasi-random dice Play: 0-ply cubeful Cube: 0-ply cubeful 2. Cubeful 3-ply 9/8 7/2 Eq.: -1.000 ( -0.468) 0.254 0.013 0.000 - 0.746 0.027 0.001 3. Cubeful 3-ply 7/2 6/5 Eq.: -1.000 ( -0.468) 0.254 0.014 0.000 - 0.746 0.027 0.001 4. Cubeful 3-ply 7/2 4/3 Eq.: -1.000 ( -0.468) 0.254 0.013 0.000 - 0.746 0.027 0.000 5. Cubeful 3-ply 7/2 3/2 Eq.: -1.000 ( -0.468) 0.254 0.013 0.000 - 0.746 0.027 0.001 Output generated Thu Aug 07 15:06:42 2003 by GNU Backgammon 0.14-devel 1.1245 030805 (Text Export version 1.50) |
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