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Rollout: Battle of the anchors

Posted By: Timothy Chow
Date: Monday, 1 March 2010, at 3:28 a.m.

In Response To: Battle of the anchors (Timothy Chow)

The "lies" in my original post roughly reflected what went through my mind OTB. I got as far as (1) realizing that breaking anchor was crazy; (2) diddling around in the outfield didn't seem to accomplish much; (3) hitting looked O.K. since I didn't mind getting hit back. So I hit with 8/3*. What I didn't really grasp was that I had the potential for a two-way game here. As Stick points out, White really has very few checkers in play, so it is hard for White to gain control of the position. White's anchor is not likely to last long, so double-slotting with a view to either building a board quickly or recirculating them for a 3-4 backgame is a powerful play.

gnubg	144
tchow	180
Position ID: xj3ggAngOWOADQ Match ID: cAkNAAAAAAAA

#		Ply	Move	Equity
•	1	R	6/4 6/3*	-0.154
			0.489 0.104 0.004 - 0.511 0.227 0.008 -0.149 -0.154 0.002 0.001 0.000 - 0.002 0.002 0.001 0.004 0.010
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 849411526 and quasi-random dice
			Play: supremo 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]
	2	R	8/3*	-0.203 ( -0.049)
			0.469 0.102 0.004 - 0.531 0.209 0.008 -0.172 -0.203 0.001 0.001 0.000 - 0.001 0.001 0.000 0.004 0.008
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 849411526 and quasi-random dice
			Play: supremo 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]
	3	R	13/8	-0.247 ( -0.093)
			0.455 0.096 0.004 - 0.545 0.199 0.007 -0.197 -0.247 0.001 0.001 0.000 - 0.001 0.001 0.000 0.004 0.009
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 849411526 and quasi-random dice
			Play: supremo 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]
	4	R	6/3*/1	-0.341 ( -0.187)
			0.431 0.096 0.003 - 0.569 0.202 0.008 -0.248 -0.341 0.001 0.001 0.000 - 0.001 0.001 0.000 0.004 0.009
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 849411526 and quasi-random dice
			Play: supremo 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]

Messages In This Thread

• Battle of the anchors
  Timothy Chow -- Saturday, 27 February 2010, at 10:46 p.m.
  • Battle of the anchors
    Chase -- Saturday, 27 February 2010, at 11:08 p.m.
  • Battle of the anchors
    Stick -- Saturday, 27 February 2010, at 11:11 p.m.
    • Battle of the anchors
      David Rockwell -- Saturday, 27 February 2010, at 11:44 p.m.
      • Battle of the anchors
        Timothy Chow -- Sunday, 28 February 2010, at 12:25 a.m.
      • Battle of the anchors
        johnk -- Monday, 1 March 2010, at 1:53 a.m.
  • Battle of the anchors
    Chuck Bower -- Sunday, 28 February 2010, at 3:49 p.m.
  • Rollout: Battle of the anchors
    Timothy Chow -- Monday, 1 March 2010, at 3:28 a.m.
    • Editing screwup
      Timothy Chow -- Monday, 1 March 2010, at 3:53 a.m.