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52D-41$-51S-52?

Posted By: Timothy Chow
Date: Sunday, 1 August 2010, at 3:05 a.m.

In Response To: RO at Gammon Go (6stones)

Interesting rollout..thanks!

In the position below, making the stronger point is enormously better, despite leaving a double direct shot instead of a double indirect shot. (The deck is somewhat stacked here since making the stronger point also creates a better distribution.)

One possible exception to the rule that a better point trumps better distribution may be when making the better point requires you to actually give up another point. For example suppose you have a 44 to play and, for two of the 4's, you have a choice between shifting your bar point to your 3 point and unstacking your 6 point to make your 2 point. Then I think it is often right to unstack.

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Unlimited game: tchow to play 25

gnubg	154
tchow	162
Position ID: 4PORASjQc+EBMA Match ID: cAkVANAAQAAA

• tchow moves 9/4 6/4

#		Ply	Move	Equity
•	1	R	9/4 6/4	+0.092
			0.522 0.155 0.008 - 0.478 0.144 0.010 +0.054 +0.092 0.002 0.002 0.000 - 0.002 0.002 0.001 0.005 0.013
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 853983941 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 5/3	-0.054 ( -0.146)
			0.486 0.145 0.007 - 0.514 0.154 0.009 -0.040 -0.054 0.002 0.002 0.000 - 0.002 0.002 0.000 0.004 0.012
			Full cubeful rollout with var.redn.
			1296 games, Mersenne Twister dice gen. with seed 853983941 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

• 61P-62R-52S-22N-32?
  Timothy Chow -- Thursday, 29 July 2010, at 6:05 p.m.
  • 61P-62R-52S-22N-32?
    Martin -- Thursday, 29 July 2010, at 6:34 p.m.
    • 61P-62R-52S-22N-32?
      Stick -- Thursday, 29 July 2010, at 7:20 p.m.
      • 61P-62R-52S-22N-32?
        Leonardo Jerkovic -- Thursday, 29 July 2010, at 7:29 p.m.
        • 61P-62R-52S-22N-32?
          neilkaz -- Thursday, 29 July 2010, at 8:07 p.m.
          • at Gammon Go?
            6stones -- Thursday, 29 July 2010, at 9:24 p.m.
            • at Gammon Go?
              neilkaz -- Thursday, 29 July 2010, at 10:28 p.m.
              • at Gammon Go?
                Nack Ballard -- Friday, 30 July 2010, at 6:17 a.m.
                • at Gammon Go?
                  Stick -- Friday, 30 July 2010, at 6:41 a.m.
                • 63S-42H-F-32 — Unlimited Games — 3-ply XG2 Rollout
                  Taper_Mike -- Sunday, 9 June 2013, at 8:18 p.m.
            • RO at Gammon Go
              6stones -- Saturday, 31 July 2010, at 6:07 a.m.
              • 52D-41$-51S-52?
                Timothy Chow -- Sunday, 1 August 2010, at 3:05 a.m.
                • 52D-41$-51S-52 — Unlimited Games — 3-ply XG2 Rollout
                  Taper_Mike -- Tuesday, 16 April 2013, at 2:56 p.m.
      • 61P-62R-52S-22N-32?
        David Rockwell -- Thursday, 29 July 2010, at 9:55 p.m.
  • 61P-62R-52S-22N-32?
    Keene -- Thursday, 29 July 2010, at 8:33 p.m.
  • 61P-62R-52S-22N-32?
    John O'Hagan -- Thursday, 29 July 2010, at 8:56 p.m.
  • 61P-22N-52S-21U-11p-63R-32 (variant)
    Nack Ballard -- Friday, 30 July 2010, at 6:05 a.m.
    • 61P-22N-52S-21U-11p-63R-32 (variant)
      Timothy Chow -- Friday, 30 July 2010, at 7:51 p.m.
      • 61P-22N-52S-21U-11p-63R-32 (variant)
        Nack Ballard -- Friday, 30 July 2010, at 10:28 p.m.
        • 61P-22N-52S-21U-11p-63R-32 (variant)
          Timothy Chow -- Friday, 30 July 2010, at 10:39 p.m.
          • 61P-22N-52S-21U-11p-63R-32 (variant)
            Nack Ballard -- Saturday, 31 July 2010, at 2:17 a.m.
        • 61P-22N-52S-21U-11p-63R-32 (variant)
          storm -- Saturday, 31 July 2010, at 8:38 a.m.
          • 61P-22N-52S-21U-11p-63R-32 (variant)
            Nack Ballard -- Sunday, 1 August 2010, at 4:51 a.m.
    • Nactations of 61P-62R-52S-22N-32 — 2011 Update
      Taper_Mike -- Friday, 23 December 2011, at 7:53 p.m.
      • Nactations of 61P-62R-52S-22N-32 — 2011 Update
        Nack Ballard -- Saturday, 24 December 2011, at 2:47 a.m.
        • Hit/more/6
          Nack Ballard -- Sunday, 25 December 2011, at 5:42 p.m.
        • Nactations of 61P-62R-52S-22N-32 — 2011 Update
          Taper_Mike -- Monday, 26 December 2011, at 12:13 a.m.
  • Rollout: 61P-62R-52S-22N-32?
    Timothy Chow -- Friday, 30 July 2010, at 10:50 p.m.
    • 61P-62R-52S-22N-32 — Unlimited Games — 3-ply XG2 Rollout
      Taper_Mike -- Thursday, 2 January 2014, at 7:18 a.m.