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Some of my favorite checkerplay problems from BGO 2011 # 4 RO

Posted By: leobueno
Date: Wednesday, 11 January 2012, at 1:41 a.m.

In Response To: Some of my favorite checkerplay problems from BGO 2011 (Timothy Chow)

The score (after 0 games) is: gnubg 1, leo 7 (match to 11 points)

Move number 3: leo to play 55

gnubg	132
leo	147
Position ID: GW/BAQPB18EBQg Match ID: cIl2ARAAOAAE

• leo moves bar/20 13/8 7/2 6/1

Cube decision
4-ply cubeless equity		-0.292	(Money: -0.310)
	0.406 0.086 0.002 - 0.594 0.203 0.008
Cubeful equities:
	4-ply cubeful prune [4ply]
1.	No double	-0.568
2.	Double, pass	+1.000	+1.568
3.	Double, take	-1.909	-1.341
Proper cube action:		No double, take (46.1%)

Alert: very bad move ( -0.102)

#		Ply	Move	Equity
	1	R	bar/10 6/1	-0.557
			0.414 0.114 0.017 - 0.586 0.229 0.008 -0.356 -0.557 0.003 0.004 0.004 - 0.003 0.003 0.001 0.007 0.019
			Full cubeful rollout with var.redn.
			497 games, Mersenne Twister dice gen. with seed 908603333 and quasi-random dice
			Stop when best play is enough JSDs ahead: limit 4 (min. 360 games)
			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	bar/20 13/8 7/2 6/1	-0.659 ( -0.102)
			0.401 0.099 0.010 - 0.599 0.230 0.004 -0.389 -0.659 0.002 0.003 0.004 - 0.002 0.004 0.001 0.007 0.016
			Full cubeful rollout with var.redn.
			494 games, Mersenne Twister dice gen. with seed 908603333 and quasi-random dice
			Stop when best play is enough JSDs ahead: limit 4 (min. 360 games)
			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]
	3	4	bar/15 13/8 6/1	-0.655 ( -0.098)
			0.413 0.086 0.002 - 0.587 0.237 0.007
			4-ply cubeful prune [4ply]
	4	3	bar/15 7/2 6/1	-0.758 ( -0.201)
			0.396 0.080 0.002 - 0.604 0.246 0.005
			3-ply cubeful prune [grandmaster]
	5	3	bar/20 8/3(2) 6/1	-0.817 ( -0.259)
			0.395 0.115 0.003 - 0.605 0.264 0.015
			3-ply cubeful prune [grandmaster]
	6	3	bar/20 21/11 6/1	-0.828 ( -0.271)
			0.390 0.099 0.003 - 0.610 0.263 0.009
			3-ply cubeful prune [grandmaster]
	7	3	bar/20 8/3 7/2 6/1	-0.869 ( -0.312)
			0.379 0.093 0.002 - 0.621 0.260 0.007
			3-ply cubeful prune [grandmaster]
	8	3	bar/20 13/3 6/1	-0.870 ( -0.312)
			0.383 0.098 0.002 - 0.617 0.264 0.011
			3-ply cubeful prune [grandmaster]

Messages In This Thread

• Some of my favorite checkerplay problems from BGO 2011
  Timothy Chow -- Tuesday, 10 January 2012, at 4:17 p.m.
  • Some of my favorite checkerplay problems from BGO 2011 # 4 RO
    leobueno -- Wednesday, 11 January 2012, at 1:41 a.m.