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Rollout + Commentary

Posted By: Stick
Date: Saturday, 19 May 2007, at 9:03 p.m.

In Response To: Ballard v. Sylvester - More Game 3 (Stick)

Kit says: It is important for Ballard to step up to the 21 point before Sylvester can bring more builders down. Ballard is in trouble, and must hit a shot or make an advanced anchor to stay in the game. If Sylvester can prevent this, he will have a game winning double.

Stick adds: This is a tough play to find OTB and I would have probably made Nack's play. One thing to always remember is that your roll comes in two parts. One thing I keep trying to improve on in my play is identifying all plays and then narrowing out what can be played. It may seem like something simple to work on but in this problem for example if you narrow down the plays and work out the 2 is 'forced' and move 23/21 then you take a fresh look at the position and figure out where the best 5 is. Keeping your checkers connected for return shots (since you have the better board & the better board) is crucial here. Also you move out of the way of letting your opponent POH when you get off the 4 pt.

The score (after 2 games) is: Nack 1, Joe 1 (match to 19 points)

Move number 15: Nack to play 25

Nack135


 ' ' ' '2X4X4X2X1O1X '2O

1X1X ' ' '5O3O4O ' ' ' '

Joe125

Position ID: 4LsHIwCw9yYAKA Match ID: MAF1AhAACAAA

Nack moves 23/21 10/5

# Ply Move Equity
1 R 23/16 -0.6674
0.32120.05130.0016-0.67880.09550.0029 -0.4047 -0.6674
0.00130.00110.0003-0.00130.00160.0002 0.0030 0.0070
Full cubeful rollout with var.redn.
1296 games, Mersenne Twister dice gen. with seed 1063580127 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 0.16
Skip pruning for 1-ply moves.
Cube: 2-ply cubeful prune [world class]
2 R 23/21 10/5 -0.7062 ( -0.0389)
0.31150.03550.0008-0.68850.08090.0019 -0.4249 -0.7062
0.00110.00090.0001-0.00110.00140.0002 0.0025 0.0061
Full cubeful rollout with var.redn.
1296 games, Mersenne Twister dice gen. with seed 1063580127 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 0.16
Skip pruning for 1-ply moves.
Cube: 2-ply cubeful prune [world class]

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