FIBS Board backgammon forum

Backgammon => Fibsboard Forum Matches => FFM2 => Topic started by: Zorba on July 04, 2009, 09:08:54 PM

Poll
Question: 5-4 to play?
Option 1: 21/12 votes: 2
Option 2: 9/4 6/2 votes: 0
Option 3: 9/4 8/4 votes: 1
Option 4: 8/4 8/3 votes: 8
Option 5: 6/2 6/1 votes: 0
Title: Game 2, move 6: Forum 5-4
Post by: Zorba on July 04, 2009, 09:08:54 PM
cLs5AANrmR0ABg:cImyABAAAAAA
Title: Re: Game 2, move 6: Forum 5-4
Post by: diane on July 04, 2009, 09:23:52 PM
Spoiler
I cant see anything but 8-3, 8-4 and try to stifle this increasing sense of discomfort  ;) We are now at a place where I dont want to leave blots, I just would not like anything else behind that formidable wall he is building.  I just wish 'not leaving blots' did something better in our home board, for when he leaves us a shot  ;)  :laugh: :laugh:
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Title: Re: Game 2, move 6: Forum 5-4
Post by: diane on July 04, 2009, 09:25:31 PM
I am still loving the new board - that was so easy to see what was going on, and which way we are going and everything  :thumbsup:

I also wanted to mention the numbering of the moves, that is making it so much easier to go to the moves in sequence when I log in - fantastic  :cool:
Title: Re: Game 2, move 6: Forum 5-4
Post by: ah_clem on July 05, 2009, 12:32:00 AM
Spoiler
running the backman at this point seems suicidal.  8/4 8/3 is the only thing I see - make a fourth point in our home board ahd don't leave blots.
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Title: Re: Game 2, move 6: Forum 5-4
Post by: stog on July 05, 2009, 01:14:50 AM
i love the 18.3kb footprint

Spoiler
and i seem to be the only one who wants to run 21/12 but i have been on homemade wine ce soir. however 5 's are our only escape and if hit we have 4 empty nests -- all gives us timing too -- which we may need! it ain't a board -- be not afraid to run!
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Title: Re: Game 2, move 6: Forum 5-4
Post by: playBunny on July 05, 2009, 03:41:10 AM
Ditto on the move. Ditto on the squint-free board.  :thumbsup:
Title: Re: Game 2, move 6: Forum 5-4
Post by: dorbel on July 06, 2009, 05:13:44 PM
Spoiler
Very often we can learn more from a wrong answer than a right one. Clearing the 8pt is clearly correct and stog's running plan is way off. This indicates that he doesn't count pointing and/or hitting numbers. Here that is 17 pointing numbers and a further 18 to hit loose! As being hit is usually fatal this all seems a bit much to give away.
Even if somehow running works (where rkb rolls 5-5 or the team can hit back from the bar and then not be hit in their turn) then you still have a man behind a five prime!
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Title: Re: Game 2, move 6: Forum 5-4
Post by: stog on July 06, 2009, 05:36:10 PM
Spoiler
mmm ......yep my suggestion does look somewhat suicidal in the cool sober light of monday! but i had been medicined with the strongest blackberry and elderberry wine in cumbria that evening! i can't remember getting home now i think of it. but let that be a lesson to all..... :)
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Title: Re: Game 2, move 6: Forum 5-4
Post by: Zorba on July 10, 2009, 12:02:50 AM
GnuBG 2-ply ROLLOUT:

Spoiler

(I skipped a few other plays that are most likely in between these two, but run or not is the most interesting comparison)

    1. Rollout          8/4 8/3                      Eq.:  -0,7010
        36,03   6,62   0,13 -  63,97  11,79   0,74 CL  -0,3710 CF  -0,7010
      [  0,10   0,09   0,04 -   0,10   0,16   0,11 CL   0,0029 CF   0,0070]
    2. Rollout          21/12                        Eq.:  -0,7739 ( -0,0729)
        32,95   8,86   0,40 -  67,05  15,84   1,53 CL  -0,4677 CF  -0,7739
      [  0,11   0,10   0,08 -   0,11   0,19   0,19 CL   0,0036 CF   0,0091]
        Full cubeful rollout with var.redn.
        2592 games, Mersenne Twister dice gen. with seed 863038590 and quasi-random dice
        Play:  2-ply cubeful prune [world class]
        keep the first 0 0-ply moves and up to 8 more moves within equity 0,12
        Skip pruning for 1-ply moves.
        Cube: 2-ply cubeful prune [world class]

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