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51$-31H-41H-63R-42P-32 — Unlimited Games — 2-ply GnuBg Trunc

Posted By: Taper_Mike
Date: Wednesday, 28 August 2013, at 9:55 p.m.

In Response To: 501 Essential Backgammon Problems #42 -- Rollout + Variants (Igor)

51$-31H-41H-63R-42P-32
Position ID: WHPwADHgc/ARIA Match ID: cIkJAAAAAAAA

#		Ply	Move	Equity
•	1	R	16/13 6/4*	-0.124819
			0.475263 0.130736 0.007440 - 0.524737 0.162440 0.006343 -0.080082 -0.124819 0.000825 0.000949 0.000208 - 0.000825 0.000938 0.000145 0.002063 0.004254
			Truncated cubeful rollout (depth 5) with var.redn.
			360 games, Mersenne Twister dice gen. with seed 725099774 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]
			Different evaluations after 2 plies:
			Play: 1-ply cubeful prune
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Cube: 2-ply cubeful prune [world class]
	2	R	13/10 6/4*	-0.139834 ( -0.015015)
			0.471732 0.146097 0.011140 - 0.528268 0.184755 0.013779 -0.097834 -0.139834 0.001082 0.000998 0.000319 - 0.001082 0.001128 0.000274 0.002909 0.005280
			Truncated cubeful rollout (depth 5) with var.redn.
			360 games, Mersenne Twister dice gen. with seed 725099774 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]
			Different evaluations after 2 plies:
			Play: 1-ply cubeful prune
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Cube: 2-ply cubeful prune [world class]
	3	R	16/11	-0.148497 ( -0.023679)
			0.467975 0.124190 0.007084 - 0.532025 0.162326 0.005088 -0.100189 -0.148497 0.000776 0.000765 0.000166 - 0.000776 0.001088 0.000102 0.002123 0.003896
			Truncated cubeful rollout (depth 5) with var.redn.
			360 games, Mersenne Twister dice gen. with seed 725099774 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]
			Different evaluations after 2 plies:
			Play: 1-ply cubeful prune
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Cube: 2-ply cubeful prune [world class]
	4	R	24/22 16/13	-0.187961 ( -0.063143)
			0.468788 0.116319 0.006878 - 0.531212 0.182377 0.005782 -0.127386 -0.187961 0.000980 0.001082 0.000217 - 0.000980 0.001173 0.000109 0.002488 0.004143
			Truncated cubeful rollout (depth 5) with var.redn.
			360 games, Mersenne Twister dice gen. with seed 725099774 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]
			Different evaluations after 2 plies:
			Play: 1-ply cubeful prune
			keep the first 0 0-ply moves and up to 8 more moves within equity 0.16
			Cube: 2-ply cubeful prune [world class]

Annotation

Truncated Rollout by Taper_Mike
2013-Aug-28
Version GNU Backgammon 0.90-mingw 20120806
51$-31H-41H-63R-42P-32-tm.sgf
[X H15 S24 R63] /0.360t

51$-31H-41H-63R-42P-32 — Unlimited Games

Bot	Seed	Equity	Nacbracs	Link
GnuBg 0.xx 2-ply Supremo	871446556	–91	[X H16 S50] /5	Timothy Chow
GnuBg 0.xx 2-ply Trunc	725099774	–124.818	[X H15 S24 R63] /0.360t	Taper_Mike (above)
XG 2.10 3-ply, Cubes: XGR	1	–97	[X H9 S55 R59] "<=13*5	Paul Weaver
XG 2.10 XGR++ Eval	[XGR++ seed]	–83.5	[X H20 S43] "&e	Taper_Mike
XG 2.10 3-ply, Cubes: XGR	94782038	–102	[X H2 R51 S54] "<=46*2	Igor Erovenko

Key: H = Hit [13/10, 6/4*], R = Run[24/22, 16/13], S = Split [16/11], X = Hit and split [16/3, 6/4*]

Explanation of nacbracs

Except, perhaps, for the opening slot, 51$-31H-41H-63R-42P-32 is a well-played sequence that leads to this position.

Mike

Messages In This Thread

• 501 Essential Backgammon Problems #42
  Igor -- Monday, 26 August 2013, at 1:49 p.m.
  • 501 Essential Backgammon Problems #42
    Adam Torkelson -- Monday, 26 August 2013, at 6:11 p.m.
  • 501 Essential Backgammon Problems #42
    Taper_Mike -- Tuesday, 27 August 2013, at 3:22 a.m.
  • Rollout Result Posted
    Paul Weaver -- Tuesday, 27 August 2013, at 2:29 p.m.
    • Rollout Result Posted
      Igor -- Tuesday, 27 August 2013, at 9:00 p.m.
    • Rollout Result Posted
      neilkaz -- Tuesday, 27 August 2013, at 10:22 p.m.
  • 501 Essential Backgammon Problems #42 -- Rollout + Variants
    Igor -- Wednesday, 28 August 2013, at 4:25 p.m.
    • 51$-31H-41H-63R-42P-32 — Unlimited Games — 2-ply GnuBg Trunc
      Taper_Mike -- Wednesday, 28 August 2013, at 9:55 p.m.
  • 501 #42 ROs
    Stick -- Friday, 30 August 2013, at 8:04 a.m.