[Bug-gnubg] Bug: pruning problem (solved or not?)

[boomslang]

Hi team,
 
I am not sure if this has been tackled yet but I get strange results in the 
following position:  

     Position ID: LQAAQAoAAAAAAA
     Match ID: cIlmAAAACAAA     

On 0-ply, it gives the correct move (5/off 2/1) but on 1-ply it rates '5/off 
4/3' equally good as '5/off 2/1'... During a full rollout it rates all three 
possible moves equally good. See tables below.

Does this have something to do with pruning? Am I running an old version 
perhaps?  I have "Version GNU Backgammon 0.90-mingw 20091102" and use a large 
cahce and one eval thread, Windows XP HE 2002 SP3.

Thx in advance


--boomslang
 
 
    1. Cubeful 0-ply    5/off 2/1                    Eq.:  +0.929
       0.732 0.000 0.000 - 0.268 0.000 0.000
        0-ply cubeful prune [expert]
    2. Cubeful 0-ply    5/off 4/3                    Eq.:  +0.734 ( -0.196)
       0.642 0.000 0.000 - 0.358 0.000 0.000
        0-ply cubeful prune [expert]
    3. Cubeful 0-ply    5/off                        Eq.:  +0.479 ( -0.450)
       0.597 0.000 0.000 - 0.403 0.000 0.000
        0-ply cubeful prune [expert]


    1. Cubeful 1-ply    5/off 2/1                    Eq.:  +0.778
       0.732 0.000 0.000 - 0.268 0.000 0.000
        1-ply cubeful prune
    2. Cubeful 1-ply    5/off 4/3                    Eq.:  +0.778 ( +0.000)
       0.642 0.000 0.000 - 0.358 0.000 0.000
        1-ply cubeful prune
    3. Cubeful 1-ply    5/off                        Eq.:  +0.712 ( -0.066)
       0.599 0.000 0.000 - 0.401 0.000 0.000
        1-ply cubeful prune





    1. Cubeful 2-ply    5/off 2/1                    Eq.:  +0.778
       0.732 0.000 0.000 - 0.268 0.000 0.000
        2-ply cubeful prune [world class]
    2. Cubeful 2-ply    5/off 4/3                    Eq.:  +0.778 ( +0.000)
       0.642 0.000 0.000 - 0.358 0.000 0.000
        2-ply cubeful prune [world class]
    3. Cubeful 2-ply    5/off                        Eq.:  +0.778 ( +0.000)
       0.599 0.000 0.000 - 0.401 0.000 0.000
        2-ply cubeful prune [world class]






    1. Rollout          5/off                        Eq.:  +0.785
       0.599 0.000 0.000 - 0.401 0.000 0.000 CL  +0.198 CF  +0.785
      [0.000 0.000 0.000 - 0.000 0.000 0.000 CL   0.000 CF   0.003]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 845114611 and 
quasi-random dice
        Play: 0-ply cubeful prune [expert]
        Cube: 0-ply cubeful prune [expert]
    2. Rollout          5/off 2/1                    Eq.:  +0.778 ( -0.008)
       0.732 0.000 0.000 - 0.268 0.000 0.000 CL  +0.463 CF  +0.778
      [0.000 0.000 0.000 - 0.000 0.000 0.000 CL   0.000 CF   0.000]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 845114611 and 
quasi-random dice
        Play: 0-ply cubeful prune [expert]
        Cube: 0-ply cubeful prune [expert]
    3. Rollout          5/off 4/3                    Eq.:  +0.778 ( -0.008)
       0.642 0.000 0.000 - 0.358 0.000 0.000 CL  +0.284 CF  +0.778
      [0.000 0.000 0.000 - 0.000 0.000 0.000 CL   0.000 CF   0.000]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 845114611 and 
quasi-random dice
        Play: 0-ply cubeful prune [expert]
        Cube: 0-ply cubeful prune [expert]






    1. Rollout          5/off 2/1                    Eq.:  +0.778
       0.732 0.000 0.000 - 0.268 0.000 0.000 CL  +0.463 CF  +0.778
      [0.000 0.000 0.000 - 0.000 0.000 0.000 CL   0.000 CF   0.000]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 845114611 and 
quasi-random dice
        Play: supremo 2-ply cubeful prune [world class]
        keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
        Skip pruning for 1-ply moves.
        Cube: 2-ply cubeful prune [world class]
    2. Rollout          5/off 4/3                    Eq.:  +0.778 ( +0.000)
       0.642 0.000 0.000 - 0.358 0.000 0.000 CL  +0.284 CF  +0.778
      [0.000 0.000 0.000 - 0.000 0.000 0.000 CL   0.000 CF   0.000]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 845114611 and 
quasi-random dice
        Play: supremo 2-ply cubeful prune [world class]
        keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
        Skip pruning for 1-ply moves.
        Cube: 2-ply cubeful prune [world class]
    3. Rollout          5/off                        Eq.:  +0.778 ( +0.000)
       0.597 0.000 0.000 - 0.403 0.000 0.000 CL  +0.194 CF  +0.778
      [0.000 0.000 0.000 - 0.000 0.000 0.000 CL   0.001 CF   0.000]
        Full cubeful rollout with var.redn.
        1296 games, Mersenne Twister dice gen. with seed 845114611 and 
quasi-random dice
        Play: supremo 2-ply cubeful prune [world class]
        keep the first 0 0-ply moves and up to 16 more moves within equity 0.32
        Skip pruning for 1-ply moves.
        Cube: 2-ply cubeful prune [world class]