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Rollout: Leonardo Jerkovic's "easy" 5-1

Posted By: Timothy Chow
Date: Tuesday, 8 June 2010, at 11:30 p.m.

In Response To: easy 5-1 (Leonardo Jerkovic)

Nobody who responded seemed to have really understood this "easy" play.

The rollout below isn't long enough to distinguish between the top two plays, but it is long enough to show that GNU doesn't think much of either 13/7 or 8/7 6/1*. This surprises me somewhat. I'm not sure what general lesson to draw from this example.

The score (after 0 games) is: gnubg 0, tchow 0 (match to 7 points)

gnubg	173
tchow	139
Position ID: 4OtgwCTgc8YHAA Match ID: cIn0AAAAAAAA

#		Ply	Move	Equity
•	1	R	8/3*/2	+0.397
			0.600 0.132 0.004 - 0.400 0.097 0.003 +0.239 +0.397 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 891656972 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	8/2	+0.386 ( -0.011)
			0.599 0.125 0.004 - 0.401 0.095 0.003 +0.230 +0.386 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 891656972 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	13/7	+0.351 ( -0.046)
			0.589 0.130 0.006 - 0.411 0.097 0.003 +0.215 +0.351 0.001 0.001 0.000 - 0.001 0.001 0.000 0.003 0.008
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 891656972 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	8/7 6/1*	+0.327 ( -0.070)
			0.588 0.126 0.004 - 0.412 0.104 0.004 +0.198 +0.327 0.001 0.002 0.000 - 0.001 0.001 0.000 0.003 0.009
			Full cubeful rollout with var.redn.
			2592 games, Mersenne Twister dice gen. with seed 891656972 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

• easy 5-1
  Leonardo Jerkovic -- Saturday, 29 May 2010, at 3:49 a.m.
  • easy 5-1
    garyo -- Saturday, 29 May 2010, at 7:40 a.m.
  • easy 5-1
    Casper van der Tak -- Saturday, 29 May 2010, at 7:45 a.m.
  • easy 5-1
    Timothy Chow -- Saturday, 29 May 2010, at 5:43 p.m.
  • easy 5-1
    neilkaz -- Saturday, 29 May 2010, at 6:43 p.m.
  • Rollout: Leonardo Jerkovic's "easy" 5-1
    Timothy Chow -- Tuesday, 8 June 2010, at 11:30 p.m.
    • Rollout: L.J.;s 5-1 -- contrast and compare
      Daniel Murphy -- Tuesday, 8 June 2010, at 11:35 p.m.
      • Rollout: L.J.;s 5-1 -- contrast and compare
        Casper van der Tak -- Wednesday, 9 June 2010, at 7:16 a.m.
    • GNU 4-ply evals of variants
      Timothy Chow -- Wednesday, 9 June 2010, at 12:22 a.m.