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BQ: Dump the midpoint?

Posted By: leobueno
Date: Sunday, 3 April 2011, at 10:12 a.m.

In Response To: BQ: Dump the midpoint? (leobueno)

After seeing Stick's response (20/11), I noted that GNUbg had not even considered that play at the 4-ply analysis level.

So I clicked the 4-ply analysis of 20/11 and guess what, it was the top play.

This has taught me a lesson: be careful when looking at GNUbg's pre-set 4-ply analysis of a whole game; it may miss the right play.

The score (after 0 games) is: diegobello 0, You 0 (match to 3 points)

Move number 7: You to play 45

diegobello	133
You	147
Position ID: M+bgAyDg85EBAw Match ID: cAl2AAAAAAAA

• You moves 11/7 6/1*

Cube decision
4-ply cubeless equity		+0.011	(Money: -0.008)
	47.8 11.3 0.2 - 52.2 7.8 0.1
Cubeful equities:
	4-ply cubeful prune
1.	No double	-0.027
2.	Double, pass	+1.000	+1.027
3.	Double, take	-0.561	-0.534
Proper cube action:		No double, take (34.2%)

Alert: bad move ( -0.068)

#		Ply	Move	Equity
	1	4	13/9 13/8	-0.232
			43.1 7.7 0.1 - 56.9 6.9 0.1
			4-ply cubeful prune
	2	4	20/11	-0.257 ( -0.025)
			45.8 8.8 0.3 - 54.2 17.8 0.2
			4-ply cubeful prune
	3	4	11/2	-0.290 ( -0.058)
			42.5 9.1 0.2 - 57.5 10.9 0.2
			4-ply cubeful prune
•	4	4	11/7 6/1*	-0.299 ( -0.068)
			42.5 8.9 0.1 - 57.5 10.6 0.2
			4-ply cubeful prune
	5	4	11/6 8/4	-0.306 ( -0.074)
			41.8 8.8 0.2 - 58.2 9.4 0.1
			4-ply cubeful prune
	6	0	11/7 8/3	-0.375 ( -0.144)
			40.5 9.2 0.2 - 59.5 13.5 0.2
			0-ply cubeful prune [expert]

Even better, I did a 2-ply rollout, stopping when JSDs > 4 (so don't know how robust this is), and . . .

The score (after 0 games) is: diegobello 0, You 0 (match to 3 points)

Move number 7: You to play 45

diegobello	133
You	147
Position ID: M+bgAyDg85EBAw Match ID: cAl2AAAAAAAA

• You moves 11/7 6/1*

Cube decision
4-ply cubeless equity		+0.011	(Money: -0.008)
	47.8 11.3 0.2 - 52.2 7.8 0.1
Cubeful equities:
	4-ply cubeful prune
1.	No double	-0.027
2.	Double, pass	+1.000	+1.027
3.	Double, take	-0.561	-0.534
Proper cube action:		No double, take (34.2%)

Alert: very bad move ( -0.148)

#		Ply	Move	Equity
	1	R	20/11	-0.277
			44.9 8.8 0.7 - 55.1 17.6 0.4 -0.239 -0.277 0.2 0.5 0.2 - 0.2 0.3 0.1 0.006 0.014
			Full cubeful rollout with var.redn.
			431 games, Mersenne Twister dice gen. with seed 884754478 and quasi-random dice
			Stop when best play is enough JSDs ahead: limit 4 (min. 1 games)
			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	13/9 13/8	-0.354 ( -0.077)
			41.3 5.8 0.2 - 58.7 7.0 0.3 -0.179 -0.354 0.2 0.3 0.0 - 0.2 0.5 0.1 0.005 0.013
			Full cubeful rollout with var.redn.
			430 games, Mersenne Twister dice gen. with seed 884754478 and quasi-random dice
			Stop when best play is enough JSDs ahead: limit 4 (min. 1 games)
			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	11/2	-0.399 ( -0.123)
			40.7 8.2 0.4 - 59.3 9.8 0.8 -0.218 -0.399 0.4 0.7 0.2 - 0.4 0.5 0.5 0.009 0.024
			Full cubeful rollout with var.redn.
			175 games, Mersenne Twister dice gen. with seed 884754478 and quasi-random dice
			Stop when best play is enough JSDs ahead: limit 4 (min. 1 games)
			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	11/6 8/4	-0.413 ( -0.136)
			40.5 7.5 0.3 - 59.5 9.7 0.2 -0.212 -0.413 0.4 1.1 0.1 - 0.4 0.7 0.1 0.009 0.028
			Full cubeful rollout with var.redn.
			161 games, Mersenne Twister dice gen. with seed 884754478 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	11/7 6/1*	-0.425 ( -0.148)
			40.5 7.5 0.2 - 59.5 9.5 0.2 -0.216 -0.425 0.4 0.5 0.0 - 0.4 0.4 0.2 0.011 0.030
			Full cubeful rollout with var.redn.
			129 games, Mersenne Twister dice gen. with seed 884754478 and quasi-random dice
			Stop when best play is enough JSDs ahead: limit 4 (min. 1 games)
			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]
	6	0	11/7 8/3	-0.375 ( -0.099)
			40.5 9.2 0.2 - 59.5 13.5 0.2
			0-ply cubeful prune [expert]

Messages In This Thread

• BQ: Dump the midpoint?
  leobueno -- Sunday, 3 April 2011, at 3:55 a.m.
  • BQ: Dump the midpoint?
    Stick -- Sunday, 3 April 2011, at 4:16 a.m.
    • 51S-41K-3-32P-43-64h-51@-21P-52D-65R-54
      Nack Ballard -- Sunday, 3 April 2011, at 9:13 a.m.
  • BQ: Dump the midpoint?
    leobueno -- Sunday, 3 April 2011, at 10:12 a.m.
    • BQ: Dump the midpoint? *Error in prior post *
      leobueno -- Sunday, 3 April 2011, at 10:21 a.m.
  • BQ: Dump the midpoint?
    Turz -- Monday, 4 April 2011, at 7:28 a.m.