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Prime vs. slime

Posted By: Sam Pottle
Date: Thursday, 25 June 2009, at 3:42 p.m.

In Response To: Prime vs. slime (Sam Pottle)

So, I panicked here. After a long look, I concluded that I would be getting the cube next turn, so I should pretend it was already DMP. I underestimated the strength of my position, and decided that I had to try to close the five point with 10/6 8/5. This turns out to be the worst way to try for the five point.

The safe 8/4 6/3 is best, burying two checkers but keeping all the blocking points, and very importantly leaving no blots. This wasn't really on my radar; my alternative play was 10/3, and this was also the consensus play in the discussion afterward. Surprisingly, 10/3 is actually worse than the play I made! It exposes a second blot and unblocks White's 9's without trying for the five point.

One tactical issue is that having a spare on the six point is less useful than usual, because I already have a compelling use for an ace on the other side of the board.

In the actual game, my opponent didn't redouble, rolled a 4, and gammoned me for the match on a 2 cube. It turns out I was right that White should double after any of my plays; scant consolation.

The score is: hiro 2, pottle 2 (match to 5 points)

gnubg	113
pottle	104
Position ID: 3G4HADC2OWcAIA Match ID: QQmuACAAEAAA

#		Ply	Move	Equity
	1	R	8/4 6/3	-0.647
			0.338 0.100 0.014 - 0.662 0.160 0.011 -0.338 -0.647 0.001 0.003 0.002 - 0.001 0.005 0.002 0.003 0.005
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 856902228 and quasi-random dice
			Play: world class 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]
	2	R	8/5 6/2	-0.736 ( -0.089)
			0.316 0.114 0.018 - 0.684 0.272 0.019 -0.369 -0.736 0.002 0.005 0.002 - 0.002 0.007 0.003 0.003 0.007
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 856902228 and quasi-random dice
			Play: world class 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]
	3	R	8/5 8/4	-0.779 ( -0.132)
			0.305 0.117 0.017 - 0.695 0.301 0.033 -0.391 -0.779 0.002 0.005 0.002 - 0.002 0.007 0.003 0.004 0.007
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 856902228 and quasi-random dice
			Play: world class 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]
	4	R	10/6 8/5	-0.824 ( -0.177)
			0.293 0.106 0.015 - 0.707 0.307 0.029 -0.413 -0.824 0.002 0.005 0.002 - 0.002 0.007 0.004 0.003 0.006
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 856902228 and quasi-random dice
			Play: world class 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]
	5	R	10/3	-0.844 ( -0.197)
			0.288 0.105 0.014 - 0.712 0.216 0.010 -0.423 -0.844 0.002 0.006 0.002 - 0.002 0.007 0.002 0.003 0.006
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 856902228 and quasi-random dice
			Play: world class 2-ply cubeful prune [world class]
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Skip pruning for 1-ply moves.
			Cube: 2-ply cubeful prune [world class]

Messages In This Thread

• Prime vs. slime
  Sam Pottle -- Wednesday, 17 June 2009, at 10:50 p.m.
  • Prime vs. slime
    garyo -- Thursday, 18 June 2009, at 12:01 a.m.
  • Prime vs. slime
    Keene -- Thursday, 18 June 2009, at 4:13 a.m.
  • Prime vs. slime
    Matt Cohn-Geier -- Thursday, 18 June 2009, at 4:25 a.m.
    • Prime vs. slime
      Coolrey -- Thursday, 18 June 2009, at 5:14 a.m.
  • Prime vs. slime
    Chuck Bower -- Thursday, 18 June 2009, at 4:44 p.m.
  • Prime vs. slime
    Sam Pottle -- Thursday, 25 June 2009, at 3:42 p.m.