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FIBS Board backgammon forum

Backgammon => Backgammon problems => Topic started by: PersianLord on March 09, 2009, 03:03:09 PM

Poll
Question: Red on roll. Proper cube action?
Option 1: Double/Take votes: 4
Option 2: Double/Pass votes: 6
Option 3: No double/Take votes: 1
Option 4: No Idea votes: 0
Option 5: No Idea votes: 0
Title: Position # 53
Post by: PersianLord on March 09, 2009, 03:03:09 PM
Position Information:

Pip-counts: Red 5-1 White
Score:        Red 0-0 White
Match:              3-pointer

Red on roll. Proper cube action?
Title: Re: Position # 53
Post by: PersianLord on March 09, 2009, 03:11:37 PM
Spoiler
Position ID: AQAAKAAAAAAAAA , Match ID: UQlgAAAAAAAA

The only bad number for Red is 1. It's probability is 11/36 (~30%). But should White pass? No. If he passes, his equity in the next game (CR game) will be just 25%, but right now his chance to win this game is about 30%. So it's better for him to take, hoping that Red will roll a 1.


Cube analysis

2-ply cubeless equity  +0.389 (Money:  +0.389)
   69.4%   0.0%   0.0% -  30.6%   0.0%   0.0%

Cubeful equities:

1. Double, take         +0.761
2. Double, pass         +1.000  ( +0.239)
3. No double            +0.389  ( -0.372)

Proper cube action: Redouble, take

BTW, I will pass the cube if my opponent is resh_lakish.
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