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61 against a holding game - RO

Posted By: Daniel Murphy
Date: Friday, 2 April 2010, at 5:35 p.m.

In Response To: 61 against a holding game (Ian Shaw)

Ian, I'm betting your rollout won't be with Gnubg 3-ply checker play and 3-ply cube, so here's one that is. I chose 3-ply checker play because the 3-ply evaluation had the best handle on relative equities and best play. And I chose 3-ply cube on the chance that it might handle redoubles better against the holding game after 13/7 8/7.

The score (after 0 games) is: White 20, Blue 17 (match to 25 points)

Move number 6: Blue to play 61

White	103
Blue	107
Position ID: btsEAQPNnIMHAA Match ID: UQknA0ABiAAA

#		Ply	Move	Equity
•	1	R	13/7 8/7	+0.402
			0.540 0.023 0.003 - 0.460 0.034 0.001 +0.091 +0.402 0.001 0.001 0.002 - 0.001 0.002 0.000 0.003 0.005
			Full cubeful rollout with var.redn.
			324 games, Mersenne Twister dice gen. with seed 848341677 and quasi-random dice
			Play: grandmaster 3-ply cubeful prune [grandmaster]
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Skip pruning for 1-ply moves.
			keep the first 0 2-ply moves and up to 2 more moves within equity 0.04
			Cube: 3-ply cubeful prune [grandmaster]
	2	R	13/6	+0.361 ( -0.041)
			0.529 0.024 0.001 - 0.471 0.030 0.001 +0.067 +0.361 0.001 0.001 0.000 - 0.001 0.002 0.000 0.003 0.005
			Full cubeful rollout with var.redn.
			324 games, Mersenne Twister dice gen. with seed 848341677 and quasi-random dice
			Play: grandmaster 3-ply cubeful prune [grandmaster]
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Skip pruning for 1-ply moves.
			keep the first 0 2-ply moves and up to 2 more moves within equity 0.04
			Cube: 3-ply cubeful prune [grandmaster]
	3	R	13/12*/6	+0.353 ( -0.049)
			0.530 0.037 0.003 - 0.470 0.139 0.000 +0.007 +0.353 0.002 0.002 0.001 - 0.002 0.004 0.003 0.005 0.009
			Full cubeful rollout with var.redn.
			324 games, Mersenne Twister dice gen. with seed 848341677 and quasi-random dice
			Play: grandmaster 3-ply cubeful prune [grandmaster]
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Skip pruning for 1-ply moves.
			keep the first 0 2-ply moves and up to 2 more moves within equity 0.04
			Cube: 3-ply cubeful prune [grandmaster]

Annotation

1. Cubeful 2-ply 13/12*/6 Eq.: +0.410

0.536 0.057 0.001 - 0.464 0.137 0.002

2. Cubeful 2-ply 13/7 8/7 Eq.: +0.404 ( -0.006)

0.555 0.022 0.000 - 0.445 0.020 0.000

1. Cubeful 3-ply 13/7 8/7 Eq.: +0.381

0.544 0.020 0.000 - 0.456 0.022 0.000

2. Cubeful 3-ply 13/6 Eq.: +0.332 ( -0.048)

0.527 0.018 0.000 - 0.473 0.024 0.000

3. Cubeful 3-ply 8/1 Eq.: +0.328 ( -0.052)

0.525 0.019 0.000 - 0.475 0.027 0.000

4. Cubeful 3-ply 13/12*/6 Eq.: +0.318 ( -0.063)

0.521 0.044 0.001 - 0.479 0.141 0.002

1. Cubeful 4-ply 13/7 8/7 Eq.: +0.400

0.551 0.023 0.000 - 0.449 0.023 0.000

2. Cubeful 4-ply 13/12*/6 Eq.: +0.397 ( -0.003)

0.535 0.052 0.001 - 0.465 0.132 0.002

---

Hmmm .. if using slow 3-ply, should probably go whole hog and use "huge" 0-ply and 2-ply pruning, instead of "normal" -- more grandmasterish!

Messages In This Thread

• 61 against a holding game
  Ian Shaw -- Wednesday, 31 March 2010, at 4:48 p.m.
  • 61 against a holding game
    Chase -- Wednesday, 31 March 2010, at 5:00 p.m.
  • 61 against a holding game
    David -- Wednesday, 31 March 2010, at 6:36 p.m.
    • 61 against a holding game
      Seth -- Thursday, 1 April 2010, at 3:38 a.m.
  • 61 against a holding game
    John O'Hagan -- Wednesday, 31 March 2010, at 10:58 p.m.
  • 61 against a holding game
    neilkaz -- Wednesday, 31 March 2010, at 11:15 p.m.
  • 61 against a holding game
    Ian Shaw -- Thursday, 1 April 2010, at 1:55 p.m.
    • 61 against a holding game
      Daniel Murphy -- Thursday, 1 April 2010, at 5:36 p.m.
      • 61 against a holding game
        Ian Shaw -- Friday, 2 April 2010, at 9:36 p.m.
    • 61 against a holding game - RO
      Daniel Murphy -- Friday, 2 April 2010, at 5:35 p.m.