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Re: [Bug-gnubg] Bug: pruning problem (solved or not?)
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From: |
motiv4u |
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Subject: |
Re: [Bug-gnubg] Bug: pruning problem (solved or not?) |
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Date: |
Tue, 16 Feb 2010 11:32:11 +0100 |
If I am not mistaken, this position
Position ID: LQAAQAoAAAAAAA
Match ID: cIlmAAAACAAA
has a Double/Pass *before* rolling that 51
N
On Thu, Feb 11, 2010 at 10:40 PM, Neil Robins <address@hidden> wrote:
>
> There is nothing wrong with the 2-ply evaluation or rollout result. All three
> plays are equally good, of course. You should never get to throw again.
> Either the opponent throws an immediate winning number or the correct cube
> action is Double/Pass at this score whatever you play now.
>
>
> boomslang wrote:
>>
>> 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]
>>
>>
>>
>>
>>
>> _______________________________________________
>> Bug-gnubg mailing list
>> address@hidden
>> http://lists.gnu.org/mailman/listinfo/bug-gnubg
>>
>>
>
> --
> View this message in context:
> http://old.nabble.com/Bug%3A-pruning-problem-%28solved-or-not-%29-tp27529821p27555172.html
> Sent from the Gnu - Backgammon mailing list archive at Nabble.com.
>
>
>
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