[Bug-gnubg] Wildly different evaluations by CRASHED network

[Ian Shaw]

    GNU Backgammon  Position ID: AAAAt+3uAAAAAA
                    Match ID   : cAkAAAAAAAAA
    +24-23-22-21-20-19------18-17-16-15-14-13-+  O: GnuBg
OOO |                  | O |                  |  0 points
OOO |                  | O |                  |  
 OO |                  | O |                  |  
 OO |                  |   |                  |  
 OO |                  |   |                  |  
    |                  |BAR|                  |v (Cube: 1)
    |                  |   |                  |  
    |                  |   |                  |  
    |          X  X  X |   |                  |  
    | X  X  X  X  X  X |   |                  |  On roll
    | X  X  X  X  X  X |   |                  |  0 points
    +-1--2--3--4--5--6-------7--8--9-10-11-12-+  X: ian


Evaluator:      CRASHED

Input           Value                    dE/dI
OFF1            0.000                   -0.079
OFF2            0.000                   -0.211
OFF3            0.000                   -0.040
BREAK_CONTACT   0.000                   -0.363
BACK_CHEQUER    0.000                   -0.053
BACK_ANCHOR     0.000                   -0.315
FORWARD_ANCHOR  0.000                   -0.020
PIPLOSS         0.000 (0.000 avg)       -0.295
P1              0.000 (0.000/36)        -0.013
P2              0.000 (0.000/36)        -0.278
BACKESCAPES     0.000 (0.000/36)        -0.176
ACONTAIN        0.000 (0.000/36)        -0.080
CONTAIN         0.000 (0.000/36)        -0.143
MOBILITY        0.000                   -0.126
MOMENT2         0.000                   -0.031
ENTER           0.000 (0.000/12)        -0.057
ENTER2          0.000                   -0.010
TIMING          0.000                   -0.079
BACKBONE        0.000                    0.004
BACKGAME        0.000                   -0.042
BACKGAME1       0.000                    0.044
FREEPIP         0.000                   -0.167

        Win     W(g)    W(bg)   L(g)    L(bg)   Equity  (cubeful)
static: 0.559   0.000   0.000   0.000   0.000   (+0.119  (+0.168))
 1 ply: 0.932   0.000   0.000   0.000   0.000   (+0.863  (+1.000))
 2 ply: 0.629   0.000   0.000   0.000   0.000   (+0.259  (+0.373))
 3 ply: 0.931   0.000   0.000   0.000   0.000   (+0.863  (+1.000))
 4 ply: 0.752   0.000   0.000   0.000   0.000   (+0.504  (+0.839))


Double, take        : +0.839
Double, pass        : +1.000   (+0.161)
No double           : +0.803   (-0.036)

Correct cube action: Double, take

                              Win    W(g)   W(bg)  L(g)   L(bg) Equity
Cubeful
            Current position 0.9480 0.0000 0.0000 0.0000 0.0000 +0.8960
n/a
              Standard error 0.0137 0.0000 0.0000 0.0000 0.0000  0.0251
n/a
2-ply 108 +vr cubeless


Note the huge discrepancies between the plies, depending on which side of
the board GnuBg is looking from. This is a humungous pass but GnuBg beavers
even at 2-ply.

--
Ian Shaw