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Position of the Day 08-20-26 - A simple reminder - Rollout + 'Bug'!

Posted By: Stick
Date: Monday, 7 September 2026, at 12:24 p.m.

In Response To: Position of the Day 08-20-26 - A simple reminder (Stick)

So what's interesting here is not only the position which most of us have stumbled across in one form or another over our bg careers but also XG's export bug. The position is the perfect example of not caring if we take or pass. Our equity if we pass, obviously -1.0. If we take? Same. It also reminds us in the process that the numbers XG shows in its panel are cubeless. Every great once in a while knowing and remembering that fact is important.

But the bug I tripped into after posting this position has to do with exporting the position. Put either of these positions into your own XG. Then hit the analysis on XGR+ or ++ or do a rollout that takes less than a second. What do you see in the results? Redouble/Pass is what you see. If you'll notice though in this post the exported analysis instead says Redouble / Take. Odd.





White is Player 2

score: 0
pip: 5
Unlimited Game
Jacoby Beaver
pip: 6
score: 0

Blue is Player 1
XGID=------A--------------a--a-:1:1:1:00:0:0:3:0:10
Blue on roll, cube action?

Analyzed in Rollout No redouble Redouble/Take
Player Winning Chances: 79.86% (G:0.00% B:0.00%) 79.86% (G:0.00% B:0.00%)
Opponent Winning Chances: 20.14% (G:0.00% B:0.00%) 20.14% (G:0.00% B:0.00%)
Cubeless Equities +0.597 +1.194
Cubeful Equities
No redouble:+0.597 (-0.403)±0.000 (+0.597..+0.597)
Redouble/Take:+1.000±0.000 (+1.000..+1.000)
Redouble/Pass:+1.000
Best Cube action: Redouble / Take
Rollout details
1296 Games rolled with Variance Reduction.
Moves: 3-ply, cube decisions: XG Roller
Double Decision confidence:100.0%
Take Decision confidence:50.0%
Duration: 0.2 second
White is Player 2

score: 0
pip: 1
Unlimited Game
Jacoby Beaver
pip: 6
score: 0

Blue is Player 1
XGID=------A-----------------a-:1:1:1:00:0:0:3:0:10
Blue on roll, cube action?

Analyzed in Rollout No redouble Redouble/Take
Player Winning Chances: 75.00% (G:0.00% B:0.00%) 75.00% (G:0.00% B:0.00%)
Opponent Winning Chances: 25.00% (G:0.00% B:0.00%) 25.00% (G:0.00% B:0.00%)
Cubeless Equities +0.500 +1.000
Cubeful Equities
No redouble:+0.500 (-0.500)±0.000 (+0.500..+0.500)
Redouble/Take:+1.000±0.000 (+1.000..+1.000)
Redouble/Pass:+1.000
Best Cube action: Redouble / Take
Rollout details
1296 Games rolled with Variance Reduction.
Moves: 3-ply, cube decisions: XG Roller
Double Decision confidence:100.0%
Take Decision confidence:50.0%
Duration: 0.3 second

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