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Rollout 2-ply Stepped

Posted By: Ian Dunstan
Date: Thursday, 8 May 2008, at 1:37 p.m.

In Response To: Rollout (Stick)

The score is: White 0, Blue 4 (match to 7 points)

Move: White to play 21

White179


'1O '1O2X4X ' '1X '1O2O

'1O2O1O2X4O '2O2X ' '3X

Blue136

Position ID: Wp7BAhKwRziGQQ Match ID: MAHlAAAAIAAA

I thought I would see what a Stepped Rollout would achieve. We get a very similar result to Stick's full 2-ply rollout as it turns out.

# Ply Move Equity
1 R bar/23* 9/8 +0.4586
54.49% 17.87% 1.14%- 45.51% 14.27% 1.42% +0.1871 +0.4586
0.13% 0.13% 0.05%- 0.13% 0.15% 0.14% 0.0040 0.0077
Full cubeful rollout with var.redn.
2592 games, Mersenne Twister dice gen. with seed 826023468 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]
Different evaluations after 12 plies:
Play: 0-ply cubeful [expert]
Cube: 2-ply cubeful prune [world class]
2 R bar/24 6/4* +0.4514 ( -0.0073)
55.31% 18.56% 1.25%- 44.69% 19.47% 2.02% +0.1628 +0.4514
0.16% 0.14% 0.07%- 0.16% 0.15% 0.16% 0.0053 0.0099
Full cubeful rollout with var.redn.
2592 games, Mersenne Twister dice gen. with seed 826023468 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]
Different evaluations after 12 plies:
Play: 0-ply cubeful [expert]
Cube: 2-ply cubeful prune [world class]
3 R bar/23* 6/5 +0.4492 ( -0.0094)
54.73% 17.54% 1.10%- 45.27% 14.67% 1.44% +0.1827 +0.4492
0.13% 0.12% 0.05%- 0.13% 0.15% 0.13% 0.0041 0.0076
Full cubeful rollout with var.redn.
2592 games, Mersenne Twister dice gen. with seed 826023468 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]
Different evaluations after 12 plies:
Play: 0-ply cubeful [expert]
Cube: 2-ply cubeful prune [world class]
• 4 R bar/24 13/11* +0.4428 ( -0.0158)
54.61% 17.95% 1.04%- 45.39% 16.66% 1.58% +0.1694 +0.4428
0.14% 0.14% 0.04%- 0.14% 0.15% 0.15% 0.0042 0.0077
Full cubeful rollout with var.redn.
2592 games, Mersenne Twister dice gen. with seed 826023468 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]
Different evaluations after 12 plies:
Play: 0-ply cubeful [expert]
Cube: 2-ply cubeful prune [world class]

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