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Gnu's double trouble

Posted By: Powerleech
Date: Saturday, 11 July 2015, at 10:54 a.m.

Hi! I hope some of you will give me some of your insight to this. I have been using gnu to improve my game for a while now, and I have found it really good in most aspects of the game. But lately, I have come across situations, where I could not see why it analyzed as it did. The position below is a moneygame, and for me this should be a CLEAR reject, not a take. Can anyone tell me, why I am wrong?

The score (after 0 games) is: gnubg 0, Sousuke 0

Move number 4: gnubg doubles to 2

gnubg125

 ' '2O3X2X2X2X2X ' ' '2O

2O '3O1X2O4O ' ' ' '1X2X
Sousuke115
Position ID: c/aAAQy4bYMFBA Match ID: MBkAAAAAAAAA

Sousuke accepts

Cube decision
2-ply cubeless equity +0.457
0.697 0.123 0.005 - 0.303 0.064 0.001
Cubeful equities:
1.No double +0.713
2.Double, pass +1.000 +0.287
3.Double, take +0.708 -0.005
Proper cube action:No double, take (1.8%)

Situations like this happens often. I have the level on "world class" with "grandmaster" in cube decisions (3-ply). I then wanted to test, if it should be because of the 21. but nope:

The score (after 0 games) is: gnubg 0, Sousuke 0

Move number 4: gnubg doubles to 2

gnubg99

 ' '2O3X3X '3X3X3X ' ' '

2O '2O2O2O2O1O '1O ' '1O
Sousuke110
Position ID: s22JAAy4c3cAAA Match ID: MBkAAAAAAAAA

Sousuke accepts

Cube decision
2-ply cubeless equity +0.535
0.758 0.027 0.000 - 0.242 0.008 0.000
Cubeful equities:
1.Double, take +0.906
2.Double, pass +1.000 +0.094
3.No double +0.876 -0.031
Proper cube action:Double, take

Maybe it is me who is worse with the cube than I thought... I also asked one friend who I believe to be a very strong player. We both agreed thaa Gnu is taking a double that should not be taken. I hope you will help answering this doubt of mine. I feel that Gnu is superior with the checkers, but takes like these make me doubt whether its evaluations for the cube makes sense.

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