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OTB and rollout

Posted By: Timothy Chow
Date: Wednesday, 3 February 2010, at 1:34 a.m.

In Response To: White to play an awkward 2-1 (Timothy Chow)

Given people's rapid response, I see no reason to wait any longer to post the rollout.

This was a training game that I played against GNU, where I was actually Blue, and GNU was White. Although it's not hard for a human to find 6/5 6/4, I thought it was interesting that GNU 2-ply found the move, because I had heard from people (Daniel Murphy, MCG, etc.) that the way to beat a bot is to slot freely and play a deep backgame because the bots don't understand such positions. Evidently GNU is not quite as stupid as I thought. :-)

Oh, and as for Paul Weaver's comment about double 5's—three of the next seven rolls were indeed double 5's, though two of those three were rolled by GNU.

gnubg	174
tchow	132
Position ID: g8/BAyDgc2LADA Match ID: MIEIAEAAMAAA

• gnubg moves 6/5 6/4

#		Ply	Move	Equity
•	1	R	6/5 6/4	-0.022
			0.522 0.121 0.004 - 0.478 0.206 0.005 -0.042 -0.022 0.002 0.002 0.000 - 0.002 0.002 0.000 0.006 0.013
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 843597317 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	8/7 6/4	-0.058 ( -0.036)
			0.506 0.118 0.005 - 0.494 0.211 0.005 -0.081 -0.058 0.002 0.002 0.000 - 0.002 0.002 0.001 0.006 0.013
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 843597317 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	6/3	-0.085 ( -0.063)
			0.496 0.120 0.004 - 0.504 0.185 0.005 -0.074 -0.085 0.002 0.002 0.000 - 0.002 0.002 0.000 0.005 0.011
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 843597317 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	10/9 6/4	-0.093 ( -0.071)
			0.498 0.121 0.004 - 0.502 0.193 0.006 -0.077 -0.093 0.002 0.002 0.000 - 0.002 0.002 0.001 0.005 0.012
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 843597317 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	8/5	-0.129 ( -0.106)
			0.486 0.119 0.004 - 0.514 0.191 0.005 -0.101 -0.129 0.002 0.002 0.000 - 0.002 0.002 0.000 0.005 0.012
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 843597317 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

• White to play an awkward 2-1
  Timothy Chow -- Tuesday, 2 February 2010, at 9:14 p.m.
  • White to play an awkward 2-1
    TheProdigy -- Tuesday, 2 February 2010, at 9:38 p.m.
    • White to play an awkward 2-1
      christian munk-christensen -- Tuesday, 2 February 2010, at 9:44 p.m.
  • White to play an awkward 2-1
    christian munk-christensen -- Tuesday, 2 February 2010, at 9:39 p.m.
  • White to play an awkward 2-1
    Chuck Bower -- Tuesday, 2 February 2010, at 9:40 p.m.
  • White to play an awkward 2-1
    Stick -- Tuesday, 2 February 2010, at 9:41 p.m.
  • White to play an awkward 2-1
    John O'Hagan -- Tuesday, 2 February 2010, at 9:45 p.m.
  • White to play an awkward 2-1
    Paul Weaver -- Tuesday, 2 February 2010, at 10:06 p.m.
  • White to play an awkward 2-1
    Nack Ballard -- Wednesday, 3 February 2010, at 12:33 a.m.
  • White to play an awkward 2-1
    neilkaz -- Wednesday, 3 February 2010, at 12:40 a.m.
  • OTB and rollout
    Timothy Chow -- Wednesday, 3 February 2010, at 1:34 a.m.
  • Naccelers -- another position for you
    Nack Ballard -- Wednesday, 3 February 2010, at 2:58 a.m.
    • Naccelers -- another position for you
      Petter Bengtsson -- Wednesday, 3 February 2010, at 3:31 p.m.
    • Naccelers -- another position for you
      Lucky Jim -- Wednesday, 3 February 2010, at 9:26 p.m.
    • Naccelers -- another position for you
      Maik Stiebler -- Thursday, 4 February 2010, at 1:09 p.m.