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GNU bug also

Posted By: Neil Robins
Date: Friday, 6 November 2015, at 8:35 a.m.

In Response To: Example of recently discussed XG bug (Timothy Chow)

During analysis of match I got:

Match to 9 points - Paul Weaver 0, Petko 0

Paul Weaver	72
Petko	99
Position ID: 290GABBsdyYGAA Match ID: UQkgAQAAAAAE

• Petko doubles

Alert: wrong double ( -0.332)! [very bad]

Cube decision
4-ply cubeless equity		+0.410	(Money: +0.410)
	0.704 0.026 0.001 - 0.296 0.024 0.000
Cubeful equities:
1.	No double	+1.332
2.	Double, take	+1.329	-0.002
3.	Double, pass	+1.000	-0.332
Proper cube action:		Too good to redouble, pass

Which reanalysed to the rather more sensible:

Match to 9 points - Paul Weaver 0, Petko 0

Paul Weaver	72
Petko	99
Position ID: 290GABBsdyYGAA Match ID: UQkgAQAAAAAE

• Petko doubles

Cube decision
4-ply cubeless equity		+0.417	(Money: +0.410)
	0.704 0.026 0.001 - 0.296 0.025 0.000
Cubeful equities:
1.	Double, take	+0.881
2.	Double, pass	+1.000	+0.119
3.	No double	+0.750	-0.131
Proper cube action:		Redouble, take

White is Paul Weaver score: 0 pip: 72 9 point match pip: 99 score: 0 Blue is Petko XGID=--aBBCC-B-A--B-----bbccbb-:1:1:1:00:0:0:0:9:10 Blue on roll, cube action?

Analyzed in Rollout No redouble Redouble/Take Player Winning Chances: 72.29% (G:2.92% B:0.06%) 72.91% (G:2.94% B:0.07%) Opponent Winning Chances: 27.71% (G:3.38% B:0.04%) 27.09% (G:3.81% B:0.05%) Cubeless Equities +0.441 +0.934 Cubeful Equities No redouble: +0.755 (-0.068) ±0.004 (+0.751..+0.759) Redouble/Take: +0.823 ±0.006 (+0.817..+0.828) Redouble/Pass: +1.000 (+0.177) Best Cube action: Redouble / Take Rollout details 2592 Games rolled with Variance Reduction. Dice Seed: 71284 First 2 moves: 4-ply, cube decisions: XG Roller+ Remaining moves: 3-ply, cube decisions: XG Roller Double Decision confidence: 100.0% Take Decision confidence: 100.0% Duration: 2 minutes 44 seconds

eXtreme Gammon Version: 2.10, MET: Rockwell-Kazaross

Messages In This Thread

• Example of recently discussed XG bug
  Timothy Chow -- Tuesday, 27 October 2015, at 11:06 p.m.
  • Example of recently discussed XG bug
    Timothy Chow -- Tuesday, 27 October 2015, at 11:09 p.m.
  • GNU bug also
    Neil Robins -- Friday, 6 November 2015, at 8:35 a.m.
    • GNU bug also
      Timothy Chow -- Friday, 6 November 2015, at 4:44 p.m.
    • GNU bug also
      Michael Petch -- Tuesday, 10 November 2015, at 5:30 p.m.