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Is this a backgame yet? Should you hit? If so, how?

Posted By: Timothy Chow
Date: Friday, 24 May 2024, at 11:26 a.m.

In Response To: Is this a backgame yet? Should you hit? If so, how? (rambiz)

rambiz wrote:

the others side should play pure and counter slot with every thing in his board and try to get as many checkers back as possible and stablish even a third anchor, This is not a strategy the bot follows.

There are circumstances under which the bot does follow such a strategy, or something like it. Below are a couple of examples from my files.





White is Player 2

score: 0
pip: 121
Unlimited Game
pip: 192
score: 0

Blue is Player 1
XGID=-aBABAB--------acbbbbbCBB-:1:1:1:21:0:0:0:0:10
Blue to play 21

1.Rollout16/4 2/1* eq: -0.962
Player:
Opponent:
23.73% (G:0.56% B:0.02%)
76.27% (G:47.74% B:7.10%)
Conf.: ± 0.008 (-0.970...-0.954) - [100.0%]
Duration: 18 minutes 12 seconds
2.Rollout16/5 6/4eq: -1.023 (-0.061)
Player:
Opponent:
20.10% (G:0.83% B:0.03%)
79.90% (G:47.71% B:4.31%)
Conf.: ± 0.006 (-1.029...-1.017) - [0.0%]
Duration: 14 minutes 52 seconds
3.Rollout16/3eq: -1.024 (-0.062)
Player:
Opponent:
20.06% (G:0.68% B:0.02%)
79.94% (G:47.52% B:4.37%)
Conf.: ± 0.006 (-1.030...-1.018) - [0.0%]
Duration: 14 minutes 48 seconds
4.Rollout15/3 2/1* eq: -1.028 (-0.066)
Player:
Opponent:
20.66% (G:0.61% B:0.02%)
79.34% (G:48.41% B:5.24%)
Conf.: ± 0.007 (-1.035...-1.022) - [0.0%]
Duration: 15 minutes 59 seconds
5.Rollout224/22 2/1* eq: -1.067 (-0.105)
Player:
Opponent:
21.54% (G:0.79% B:0.03%)
78.46% (G:53.85% B:6.49%)
Conf.: ± 0.016 (-1.083...-1.051) - [0.0%]
Duration: 5 minutes 21 seconds
6.Rollout224/23 5/3eq: -1.068 (-0.106)
Player:
Opponent:
17.95% (G:0.81% B:0.02%)
82.05% (G:47.60% B:3.50%)
Conf.: ± 0.010 (-1.078...-1.058) - [0.0%]
Duration: 3 minutes 45 seconds
 
1 5184 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller

2 1296 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.19.211.pre-release






White is Player 2

score: 0
pip: 131
Unlimited Game
pip: 217
score: 0

Blue is Player 1
XGID=--aBBB--a-aA----bbbbbCbBBA:1:1:1:32:0:0:0:0:10
Blue to play 32

1.Rollout1Bar/23 5/2* eq: -0.744
Player:
Opponent:
30.46% (G:1.62% B:0.05%)
69.54% (G:43.40% B:7.52%)
Conf.: ± 0.019 (-0.763...-0.725) - [100.0%]
Duration: 25 minutes 19 seconds
2.Rollout1Bar/23 4/1eq: -0.822 (-0.078)
Player:
Opponent:
27.49% (G:1.44% B:0.13%)
72.51% (G:44.18% B:7.07%)
Conf.: ± 0.020 (-0.842...-0.802) - [0.0%]
Duration: 23 minutes 59 seconds
3.Rollout1Bar/23 11/8* eq: -0.828 (-0.084)
Player:
Opponent:
26.94% (G:1.93% B:0.09%)
73.06% (G:44.31% B:6.38%)
Conf.: ± 0.018 (-0.846...-0.810) - [0.0%]
Duration: 24 minutes 00 second
 
1 1296 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.19.211.pre-release






White is Player 2

score: 0
pip: 151
Unlimited Game
pip: 217
score: 0

Blue is Player 1
XGID=a--aaBC-Aa-B---c---cbCcABA:1:1:1:21:0:0:0:0:10
Blue to play 21

1.Rollout1Bar/23 5/4* eq: +0.022
Player:
Opponent:
51.45% (G:7.24% B:0.35%)
48.55% (G:26.52% B:5.71%)
Conf.: ± 0.011 (+0.010...+0.033) - [100.0%]
Duration: 2 hours 44 minutes
2.Rollout1Bar/24 6/4* eq: -0.019 (-0.041)
Player:
Opponent:
48.75% (G:10.25% B:0.53%)
51.25% (G:27.76% B:4.49%)
Conf.: ± 0.010 (-0.029...-0.010) - [0.0%]
Duration: 2 hours 18 minutes
3.Rollout2Bar/24 11/9* eq: -0.049 (-0.071)
Player:
Opponent:
47.54% (G:10.69% B:0.58%)
52.46% (G:27.82% B:4.13%)
Conf.: ± 0.017 (-0.066...-0.032) - [0.0%]
Duration: 29 minutes 37 seconds
4.Rollout2Bar/23 6/5eq: -0.067 (-0.089)
Player:
Opponent:
47.70% (G:8.22% B:0.39%)
52.30% (G:27.55% B:4.09%)
Conf.: ± 0.018 (-0.085...-0.049) - [0.0%]
Duration: 34 minutes 54 seconds
5.Rollout2Bar/23 8/7eq: -0.067 (-0.089)
Player:
Opponent:
47.42% (G:8.07% B:0.41%)
52.58% (G:27.21% B:4.06%)
Conf.: ± 0.017 (-0.084...-0.051) - [0.0%]
Duration: 34 minutes 56 seconds
 
1 5184 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller

2 1296 Games rolled with Variance Reduction.
Dice Seed: 271828
Moves: 3-ply, cube decisions: XG Roller

eXtreme Gammon Version: 2.19.211.pre-release

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