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Rollout: Duplicated 2's

Posted By: Timothy Chow
Date: Sunday, 1 August 2010, at 3:58 a.m.

In Response To: Rollout: Duplicated 2's (Timothy Chow)

I rolled out the position suggested by Daniel Murphy. If we can trust the absolute equities of these rollouts, then the message seems to be:

1. 6/4 is a much better 2 than 24/22;

2. 6/3 damages the position after 6/4, and 4/1* damages the position after 24/22, but by a lesser amount;

3. however, the excess damage of 6/3 is not enough to cancel out the superiority of 6/4 over 24/22.

---

gnubg	124
tchow	149
Position ID: 2G4HAyAmn8EARg Match ID: UYkIACAAEAAA

#		Ply	Move	Equity
•	1	R	bar/24 6/4	-0.618
			0.216 0.033 0.001 - 0.784 0.156 0.006 -0.696 -0.618 0.001 0.001 0.000 - 0.001 0.002 0.001 0.004 0.005
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 897429772 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	bar/22	-0.695 ( -0.077)
			0.191 0.020 0.001 - 0.809 0.165 0.005 -0.766 -0.695 0.001 0.001 0.000 - 0.001 0.002 0.000 0.003 0.005
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 897429772 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]

---

For convenience, I'm reposting the previous rollout so that you can see everything on a single page.

gnubg	124
tchow	148
Position ID: 2G4HAyAmn8EAJg Match ID: UYkJACAAEAAA

#		Ply	Move	Equity
•	1	R	6/4 6/3	-0.667
			0.220 0.033 0.001 - 0.780 0.217 0.009 -0.752 -0.667 0.002 0.001 0.000 - 0.002 0.002 0.001 0.004 0.005
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 895950864 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	24/22 4/1*	-0.711 ( -0.043)
			0.180 0.015 0.000 - 0.820 0.149 0.005 -0.778 -0.711 0.001 0.001 0.000 - 0.001 0.002 0.000 0.003 0.004
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 895950864 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

• Duplicated 2's
  Timothy Chow -- Thursday, 29 July 2010, at 1:05 a.m.
  • Duplicated 2's
    Martin -- Thursday, 29 July 2010, at 5:57 a.m.
  • Rollout: Duplicated 2's
    Timothy Chow -- Friday, 30 July 2010, at 2:47 a.m.
    • Rollout: Duplicated 2's
      Daniel Murphy -- Friday, 30 July 2010, at 2:51 a.m.
      • Rollout: Duplicated 2's
        Timothy Chow -- Friday, 30 July 2010, at 3:14 a.m.
        • Rollout: Duplicated 2's
          Timothy Chow -- Sunday, 1 August 2010, at 3:58 a.m.
          • Rollout: at Gammon Save
            6stones -- Sunday, 1 August 2010, at 6:19 p.m.