Advanced Backgammon part 24A ROLLOUT

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Advanced Backgammon part 24A ROLLOUT

Posted By: Matt Cohn-Geier
Date: Friday, 26 June 2009, at 3:56 a.m.

In Response To: Advanced Backgammon part 24A (Matt Cohn-Geier)

Position 231:
Pile spares high since White will come in and crack.
Move number 5: Blue to play 34

White 115

Blue 79
Position ID: 27YBAFi23SkBAA Match ID: QYkRAAAAAAAA

• Blue moves 9/6 8/4

# Ply Move Equity

1 R 9/6 8/4 +1.1010

0.8822 0.3550 0.0303 - 0.1178 0.0001 0.0000 +1.1497 +1.1010

0.0002 0.0003 0.0001 - 0.0002 0.0000 0.0000 0.0005 0.0006

Full cubeful rollout with var.redn.

49556 games, Mersenne Twister dice gen. with seed 814320403 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

2 R 8/4 6/3 +1.0983 ( -0.0027)

0.8827 0.3524 0.0292 - 0.1173 0.0002 0.0000 +1.1468 +1.0983

0.0002 0.0003 0.0001 - 0.0002 0.0000 0.0000 0.0005 0.0006

Full cubeful rollout with var.redn.

49556 games, Mersenne Twister dice gen. with seed 814320403 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

• 3 R 11/4 +1.0902 ( -0.0108)

0.8794 0.3528 0.0295 - 0.1206 0.0001 0.0000 +1.1410 +1.0902

0.0008 0.0010 0.0004 - 0.0008 0.0002 0.0000 0.0018 0.0022

Full cubeful rollout with var.redn.

3584 games, Mersenne Twister dice gen. with seed 814320403 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

4 R 9/5 6/3 +1.0807 ( -0.0203)

0.8780 0.3457 0.0288 - 0.1220 0.0000 0.0000 +1.1305 +1.0807

0.0013 0.0015 0.0007 - 0.0013 0.0004 0.0000 0.0029 0.0036

Full cubeful rollout with var.redn.

1296 games, Mersenne Twister dice gen. with seed 814320403 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

5 R 11/8 9/5 +1.0736 ( -0.0274)

0.8754 0.3457 0.0283 - 0.1246 0.0000 0.0000 +1.1247 +1.0736

0.0013 0.0015 0.0008 - 0.0013 0.0003 0.0000 0.0029 0.0036

Full cubeful rollout with var.redn.

1296 games, Mersenne Twister dice gen. with seed 814320403 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

6 R 9/5 8/5 +1.0577 ( -0.0433)

0.8728 0.3370 0.0267 - 0.1272 0.0001 0.0000 +1.1092 +1.0577

0.0013 0.0015 0.0007 - 0.0013 0.0001 0.0000 0.0032 0.0039

Full cubeful rollout with var.redn.

1296 games, Mersenne Twister dice gen. with seed 814320403 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

Position 232:
Main objective here is to keep White on the bar and bear off as many checkers as possible before clearing. Either 9/6 8/4 or 11/4 works well for that purpose. 8/4 6/3, preparing to clear the 6 point, is third best but a little weak.
Move number 5: Blue to play 34

White 94

Blue 79
Position ID: 3zcAAFi23SkBAA Match ID: QYkRAAAAAAAA

• Blue moves 9/6 8/4

# Ply Move Equity

• 1 R 9/6 8/4 +1.3945

0.9780 0.4181 0.0271 - 0.0220 0.0000 0.0000 +1.4012 +1.3945

0.0001 0.0002 0.0001 - 0.0001 0.0000 0.0000 0.0002 0.0002

Full cubeful rollout with var.redn.

88603 games, Mersenne Twister dice gen. with seed 814420146 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

2 R 11/4 +1.3944 ( -0.0001)

0.9775 0.4196 0.0268 - 0.0225 0.0000 0.0000 +1.4013 +1.3944

0.0001 0.0002 0.0001 - 0.0001 0.0000 0.0000 0.0002 0.0002

Full cubeful rollout with var.redn.

88602 games, Mersenne Twister dice gen. with seed 814420146 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

3 R 8/4 6/3 +1.3904 ( -0.0041)

0.9775 0.4167 0.0258 - 0.0225 0.0000 0.0000 +1.3975 +1.3904

0.0003 0.0009 0.0004 - 0.0003 0.0000 0.0000 0.0010 0.0010

Full cubeful rollout with var.redn.

4496 games, Mersenne Twister dice gen. with seed 814420146 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

4 R 9/5 6/3 +1.3830 ( -0.0115)

0.9780 0.4078 0.0257 - 0.0220 0.0000 0.0000 +1.3895 +1.3830

0.0006 0.0016 0.0007 - 0.0006 0.0000 0.0000 0.0018 0.0019

Full cubeful rollout with var.redn.

1295 games, Mersenne Twister dice gen. with seed 814420146 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

5 R 11/8 9/5 +1.3818 ( -0.0127)

0.9772 0.4079 0.0259 - 0.0228 0.0000 0.0000 +1.3883 +1.3818

0.0006 0.0016 0.0007 - 0.0006 0.0009 0.0000 0.0018 0.0019

Full cubeful rollout with var.redn.

1295 games, Mersenne Twister dice gen. with seed 814420146 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

6 R 11/7 8/5 +1.3798 ( -0.0147)

0.9747 0.4129 0.0256 - 0.0253 0.0002 0.0000 +1.3877 +1.3798

0.0006 0.0016 0.0008 - 0.0006 0.0001 0.0000 0.0019 0.0021

Full cubeful rollout with var.redn.

1295 games, Mersenne Twister dice gen. with seed 814420146 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

7 R 9/5 8/5 +1.3721 ( -0.0224)

0.9769 0.4006 0.0248 - 0.0231 0.0000 0.0000 +1.3791 +1.3721

0.0006 0.0016 0.0008 - 0.0006 0.0000 0.0000 0.0019 0.0020

Full cubeful rollout with var.redn.

1295 games, Mersenne Twister dice gen. with seed 814420146 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

8 R 11/7 9/6 +1.3705 ( -0.0240)

0.9724 0.4096 0.0251 - 0.0276 0.0002 0.0000 +1.3793 +1.3705

0.0006 0.0017 0.0008 - 0.0006 0.0001 0.0000 0.0019 0.0020

Full cubeful rollout with var.redn.

1295 games, Mersenne Twister dice gen. with seed 814420146 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

Position 233:
7/5 is wrong here because it overstacks the 5 point and an aggressive bearoff is not really necessary, Blue will usually win a G through normal procedure and it doesn't really increase his chances of winning a BG.
In this case the two high points being stripped doesn't mean a lot since 6s are killed and 5s and 4s play from the bar. The gap on the 4 point and the preparation to clear the 6 is bigger here.
Move number 5: Blue to play 26

White 204

Blue 70
Position ID: yDM4AF62vRsAAA Match ID: QQkZAAAAAAAA

• Blue moves 6/4

# Ply Move Equity

• 1 R 6/4 +1.2352

0.7896 0.6265 0.1401 - 0.2104 0.0007 0.0000 +1.3449 +1.2352

0.0021 0.0021 0.0019 - 0.0021 0.0015 0.0003 0.0064 0.0076

Full cubeful rollout with var.redn.

3059 games, Mersenne Twister dice gen. with seed 814572585 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

2 R 5/3 +1.2013 ( -0.0339)

0.7812 0.6199 0.1330 - 0.2188 0.0009 0.0000 +1.3144 +1.2013

0.0020 0.0020 0.0018 - 0.0020 0.0002 0.0000 0.0059 0.0071

Full cubeful rollout with var.redn.

3058 games, Mersenne Twister dice gen. with seed 814572585 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

3 R 7/5 +1.1931 ( -0.0421)

0.7768 0.6164 0.1413 - 0.2232 0.0004 0.0000 +1.3109 +1.1931

0.0027 0.0026 0.0025 - 0.0027 0.0012 0.0004 0.0082 0.0098

Full cubeful rollout with var.redn.

1986 games, Mersenne Twister dice gen. with seed 814572585 and quasi-random dice

Play: 2-ply cubeful prune [world class]

keep the first 0 0-ply moves and up to 12 more moves within equity 0.2

Skip pruning for 1-ply moves.

Cube: 2-ply cubeful prune [world class]

White	115

Blue	79
Position ID: `27YBAFi23SkBAA` Match ID: `QYkRAAAAAAAA`

White	94

Blue	79
Position ID: `3zcAAFi23SkBAA` Match ID: `QYkRAAAAAAAA`

White	204

Blue	70
Position ID: `yDM4AF62vRsAAA` Match ID: `QQkZAAAAAAAA`

Messages In This Thread

Advanced Backgammon part 24A
Matt Cohn-Geier -- Thursday, 25 June 2009, at 2:32 a.m.
- Advanced Backgammon part 24A
  Chuck Bower -- Thursday, 25 June 2009, at 4:33 p.m.
  - Advanced Backgammon part 24A
    Robert Maier -- Friday, 26 June 2009, at 1:46 a.m.
    - Uh, we'll be on the clock
      Chuck Bower -- Friday, 26 June 2009, at 1:07 p.m.
- Robertie's picks
  Matt Cohn-Geier -- Thursday, 25 June 2009, at 5:34 p.m.
- Advanced Backgammon part 24A ROLLOUT
  Matt Cohn-Geier -- Friday, 26 June 2009, at 3:56 a.m.

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