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GNU error ?!?!

Posted By: pontiac
Date: Wednesday, 8 October 2008, at 12:59 p.m.

hi

this is a position i try to learn some reference positions about dbl take decisions, anyway i load the position on gnu and ask several times about is it dbl or not (of cours it is too good when look at the position) but i want to learn how it changes with number of checkers at 2 pt ... gnu says it is dbl ???

even gammon chance is too high to 90 percent i guess it says dbl as it seems in the position below.. another interesting thing is after finished the game i won gammon he gave me 1 pt not 2 pt .. so it evaluates the decision for this point i guess..

what is going on? can anyone explain?

1)this is the first one its dbl take percentage

The score (after 0 games) is: tirol 0, umur 0

Move number 6: umur on roll, cube decision?

tirol106


 ' '2X2X2X3X2X2X '1X ' '

1X6O ' ' ' ' ' ' ' ' ' '

umur12

Position ID: bLtNACB+AAAAAA Match ID: cAkAAAAAAAAA

• umur doubles

Cube decision
Rollout cubeless equity +1,868 
Cubeful equities:
1.Vido, pes +1,000 
2.Vido, al +3,678 +2,678
3.No double +0,924 -0,076
Proper cube action:Vido, pes
Rollout details
 WinW gW bg LoseL gL bgCubelessCubeful
Centered 1-cube 95,5 89,3 6,6- 4,5 0,0 0,0 +1,868 +0,924
Standard error 0,2 0,2 0,2- 0,2 0,0 0,0 0,006 0,011
Player tirol owns 2-cube 95,2 89,1 6,6- 4,8 0,0 0,0 +3,722 +3,678
Standard error 0,2 0,1 0,2- 0,2 0,0 0,0 0,010 0,014
Full cubeful rollout with var.redn.
274 games, Mersenne Twister dice gen. with seed 834694915 and quasi-random dice
Stop when best play is enough JSDs ahead: limit 3,04 (min. 144 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)and the second one, after finish game i won 1 pt instead of 2 pt

The score (after 1 game) is: tirol 0, umur 1

Move number 2: umur on roll, cube decision?

tirol161


2O ' ' ' '5X '4X ' ' '5O

1X1X ' ' '5O '3O ' ' '4X

umur167

Position ID: 4PPgASjgc/ABMA Match ID: cAkAAAAACAAA

• umur moves 24/23 13/11

Cube decision
2-ply cubeless equity -0,027 
  49,2 12,9 0,4 - 50,8 13,7 0,5
Cubeful equities:
 2-ply cubeful prune [world class]
1.No double -0,033 
2.Vido, pes +1,000 +1,033
3.Vido, al -0,399 -0,366
Proper cube action:No double, beaver (26,2%)

 

# Ply Hamle Equity
  1 2 24/21 -0,136
  47,0 10,7 0,3 - 53,0 14,9 0,4  
  2-ply cubeful prune [world class]  
  2 2 13/10 -0,150 ( -0,014)
  46,1 11,8 0,4 - 53,9 15,4 0,7  
  2-ply cubeful prune [world class]  
• 3 2 24/23 13/11 -0,153 ( -0,017)
  46,3 11,5 0,3 - 53,7 15,5 0,5  
  2-ply cubeful prune [world class]  
  4 2 13/11 6/5 -0,160 ( -0,024)
  46,7 11,9 0,4 - 53,3 17,0 1,1  
  2-ply cubeful prune [world class]  

as seen 1pt i played just to load the position here

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