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Re: [Bug-gnubg] More than 2?
From: |
Christian Anthon |
Subject: |
Re: [Bug-gnubg] More than 2? |
Date: |
Tue, 5 Aug 2008 14:37:06 +0200 |
Hi Achim,
the reason is that the gammon-value is about 0.75 at the score
compared to the normal 0.5. This means that winning 2 points is more
than twice as valuable as winning 1 point and since the base for
calculating the EMG number is winning 1 point, you end up with a
equity higher than 2.
Christian.
On Mon, Aug 4, 2008 at 3:14 AM, Mueller Achim <address@hidden> wrote:
> Hi folks,
> GNU Backgammon Position ID: 7wAAALZzhgUAAA
> Match ID : cIlmAAAAAAAA
> +24-23-22-21-20-19------18-17-16-15-14-13-+ O: xxx
> OO | O O | | X | 0 points
> OO | O O | | |
> OO | O O | | |
> O | O | | |
> O | | | |
> | |BAR| |v 3 point match (Cube: 1)
> | | | |
> | | | |
> | X X | | |
> | X X X X | | X X | Rolled 51
> | X X X X | | X X | 0 points
> +-1--2--3--4--5--6-------7--8--9-10-11-12-+ X: yyy
> 1. Rollout 12/6 Eq.: -2.018
> 0.000 0.000 0.000 - 1.000 0.671 0.000 CL -2.018 CF -2.018
> [0.000 0.000 0.000 - 0.000 0.002 0.000 CL 0.004 CF 0.004]
> Truncated cubeful rollout (depth 8) with var.redn.
> 216 games, Mersenne Twister dice gen. with seed 834643698 and
> quasi-random dice
> Play: world class 2-ply cubeful prune [world class]
> keep the first 0 0-ply moves and up to 8 more moves within equity
> 0.16
> Skip pruning for 1-ply moves.
> Cube: 2-ply cubeful prune [world class]
> 2. Rollout 13/8 12/11 Eq.: -2.086 ( -0.068)
> 0.000 0.000 0.000 - 1.000 0.716 0.000 CL -2.086 CF -2.086
> [0.000 0.000 0.000 - 0.000 0.003 0.000 CL 0.004 CF 0.004]
> Truncated cubeful rollout (depth 8) with var.redn.
> 216 games, Mersenne Twister dice gen. with seed 834643698 and
> quasi-random dice
> Play: world class 2-ply cubeful prune [world class]
> keep the first 0 0-ply moves and up to 8 more moves within equity
> 0.16
> Skip pruning for 1-ply moves.
> Cube: 2-ply cubeful prune [world class]
> 3. Rollout 13/7 Eq.: -2.109 ( -0.090)
> 0.000 0.000 0.000 - 1.000 0.731 0.000 CL -2.109 CF -2.109
> [0.000 0.000 0.000 - 0.000 0.003 0.000 CL 0.005 CF 0.005]
> Truncated cubeful rollout (depth 8) with var.redn.
> 216 games, Mersenne Twister dice gen. with seed 834643698 and
> quasi-random dice
> Play: world class 2-ply cubeful prune [world class]
> keep the first 0 0-ply moves and up to 8 more moves within equity
> 0.16
> Skip pruning for 1-ply moves.
> Cube: 2-ply cubeful prune [world class]
> 4. Cubeful 2-ply 12/11 8/3 Eq.: -2.110 ( -0.091)
> 0.000 0.000 0.000 - 1.000 0.732 0.000
> 2-ply cubeful prune [world class]
> 5. Cubeful 2-ply 13/8 2/1 Eq.: -2.137 ( -0.118)
> 0.000 0.000 0.000 - 1.000 0.749 0.000
> 2-ply cubeful prune [world class]
>
>
> How can the equity be more than -2?
> Ciao
> Achim
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