BGonline.org Forums

Rollout

Posted By: Timothy Chow
Date: Thursday, 12 November 2009, at 9:24 p.m.

In Response To: 15 checkers against 1 at DMP (Timothy Chow)

I didn't say so in my original message, but my real question here, as lenny surmised, is (a) whether playing 8/3(2) 7/2*(2) has any merit, and (b) whether the bots can be trusted to roll primes a short distance.

GNU 0-ply thinks that 8/3(2) 7/2*(2) is 42nd best (!), but a rollout puts it within striking distance of 22/12 19/9 (which I picked for no better reason than that it happens to be GNU 2-ply's top choice). Can these numbers be trusted?

The score is: gnubg 0, tchow 0 (match to 1 point, post-Crawford play)

gnubg	23
tchow	140
Position ID: AABAYNsWGCIAAA Match ID: cIk2AAAAAAAA

#		Ply	Move	Equity
•	1	R	22/12 19/9	-0.851
			0.074 0.000 0.000 - 0.926 0.062 0.048 -0.851 -0.851 0.002 0.000 0.000 - 0.002 0.001 0.001 0.003 0.003
			Full cubeful rollout with var.redn.
			5184 games, Mersenne Twister dice gen. with seed 869873060 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(2) 7/2*(2)	-0.861 ( -0.010)
			0.069 0.000 0.000 - 0.931 0.101 0.088 -0.861 -0.861 0.001 0.000 0.000 - 0.001 0.001 0.001 0.003 0.003
			Full cubeful rollout with var.redn.
			5184 games, Mersenne Twister dice gen. with seed 869873060 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

• 15 checkers against 1 at DMP
  Timothy Chow -- Thursday, 12 November 2009, at 4:34 a.m.
  • 15 checkers against 1 at DMP
    Marv Porten -- Thursday, 12 November 2009, at 5:33 a.m.
    • 15 checkers against 1 at DMP
      lenny -- Thursday, 12 November 2009, at 7:00 a.m.
      • 15 checkers against 1 at DMP
        Daniel Murphy -- Thursday, 12 November 2009, at 4:34 p.m.
    • 15 checkers against 1 at DMP
      Jason Lee -- Thursday, 12 November 2009, at 3:37 p.m.
      • 15 checkers against 1 at DMP
        Sam Pottle -- Thursday, 12 November 2009, at 8:04 p.m.
  • 15 checkers against 1 at DMP
    Gregg Cattanach -- Thursday, 12 November 2009, at 3:02 p.m.
    • 15 checkers against 1 at DMP
      TarHeelFan -- Thursday, 12 November 2009, at 4:58 p.m.
      • 15 checkers against 1 at DMP
        Gregg Cattanach -- Thursday, 12 November 2009, at 5:03 p.m.
  • 15 checkers against 1 at DMP
    Chuck Bower -- Thursday, 12 November 2009, at 5:13 p.m.
  • 15 checkers against 1 at DMP
    Keene -- Thursday, 12 November 2009, at 8:17 p.m.
  • Rollout
    Timothy Chow -- Thursday, 12 November 2009, at 9:24 p.m.
    • Rollout
      Chuck Bower -- Thursday, 12 November 2009, at 11:26 p.m.