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Rollout: Late opening 61 to play

Posted By: Timothy Chow
Date: Sunday, 29 August 2010, at 11:22 p.m.

In Response To: Late opening 61 to play (Timothy Chow)

I played 8/2 3/2 here, figuring that a point is a point, even though it's not a great one. Well behind in the race, I thought I should concentrate on building a board. 20/13 looked like an anti-thematic racing play to me.

I did not consider any plays that left a blot on the 14 point. Christian describes that blot as a "diversion," which is an interesting analysis. I can see that White would prefer to build points rather than worry about safetying her blot. Still, I find it counterintuitive because I would think that 20/13 attacks the rear blot almost as effectively without giving White another blot to shoot at.

If one really cares about sorting the top plays into the correct order then a longer rollout is necessary. For me it's enough to know that 8/2 3/2 is not horrible but probably not best, and that the QF plays involving 20/14 are serious contenders if not outright best. Hopefully I'll at least consider the QF plays in future, similar positions.

gnubg	130
tchow	156
Position ID: 4PMZCwDEt8GAKA Match ID: cAkHAAAAAAAA

#		Ply	Move	Equity
•	1	R	23/22 20/14	-0.638
			0.332 0.074 0.003 - 0.668 0.176 0.010 -0.446 -0.638 0.001 0.001 0.000 - 0.001 0.002 0.001 0.003 0.009
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 894844442 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	20/14 6/5	-0.644 ( -0.006)
			0.343 0.078 0.003 - 0.657 0.206 0.016 -0.455 -0.644 0.001 0.001 0.000 - 0.001 0.002 0.001 0.003 0.010
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 894844442 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	20/13	-0.662 ( -0.023)
			0.328 0.067 0.003 - 0.672 0.141 0.006 -0.423 -0.662 0.001 0.001 0.000 - 0.001 0.001 0.000 0.003 0.007
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 894844442 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	8/2 3/2	-0.666 ( -0.028)
			0.322 0.076 0.003 - 0.678 0.164 0.011 -0.451 -0.666 0.001 0.001 0.000 - 0.001 0.001 0.001 0.003 0.008
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 894844442 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]
	5	R	24/23 20/14	-0.689 ( -0.051)
			0.319 0.060 0.002 - 0.681 0.120 0.006 -0.424 -0.689 0.001 0.001 0.000 - 0.001 0.001 0.000 0.003 0.007
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 894844442 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

• Late opening 61 to play
  Timothy Chow -- Saturday, 28 August 2010, at 9:36 p.m.
  • Late opening 61 to play
    christian munk-christensen -- Sunday, 29 August 2010, at 5:42 a.m.
  • 63S-42H-52H-62H-55
    storm -- Sunday, 29 August 2010, at 11:58 a.m.
    • 63S-42H-52H-62H-55
      Timothy Chow -- Sunday, 29 August 2010, at 5:47 p.m.
    • 63S-42H-52H-62H-55
      Petter Bengtsson -- Sunday, 29 August 2010, at 6:13 p.m.
    • 63S-42H-52H-62H-55
      Nack Ballard -- Sunday, 29 August 2010, at 11:44 p.m.
  • 63S-42H-52H-62H-55R-63z-52S-51X-65R-61
    Nack Ballard -- Sunday, 29 August 2010, at 7:53 p.m.
    • Nactation
      Timothy Chow -- Sunday, 29 August 2010, at 10:59 p.m.
      • Nactation
        Nack Ballard -- Sunday, 29 August 2010, at 11:50 p.m.
  • Late opening 61 to play
    Casper van der Tak -- Sunday, 29 August 2010, at 9:43 p.m.
  • Rollout: Late opening 61 to play
    Timothy Chow -- Sunday, 29 August 2010, at 11:22 p.m.