This happens when the evaluation is bad enough to allow for bad takes later.
Christian. On Fri, Aug 21, 2009 at 9:48 PM, Timothy Y. Chow<[email protected]> wrote: > I just rolled out a cube decision and gnubg evaluated "no double" at greater > than +1.000 equity despite the fact that a gammon was no longer possible. > Below is the text output; I can email the .sgf file if anyone > wants it. > > Tim > > > The score (after 0 games) is: gnubg 0, tchow 0 > Match Information: > > Date: 08/21/2009 > Move number 1: gnubg on roll, cube decision? > > GNU Backgammon Position ID: bgAAULZtEwAiAA > Match ID : AQEAAAAAAAAA > +12-11-10--9--8--7-------6--5--4--3--2--1-+ O: gnubg (Cube: 2) > | O O | | O O O O O X | 0 points > | O | | O O O O O | On roll > | | | | > | | | | > | | | | > ^| |BAR| | > | | | | X > | | | | X > | | | X | XX > | | | X X | XX > | | X | O X X O | XX 0 points > +13-14-15-16-17-18------19-20-21-22-23-24-+ X: tchow > Pip counts: O 108, X 61 > > * gnubg doubles > > Alert: wrong double ( -0.167)! > Rollout details: > Player gnubg owns 2-cube: > 0.828 0.000 0.000 - 0.172 0.007 0.001 CL +0.647 CF +1.167 > [0.002 0.000 0.000 - 0.002 0.000 0.000 CL 0.004 CF 0.010] > Player tchow owns 4-cube: > 0.859 0.000 0.000 - 0.141 0.006 0.001 CL +1.422 CF +1.325 > [0.002 0.000 0.000 - 0.002 0.000 0.000 CL 0.008 CF 0.010] > Full cubeful rollout with var.redn. > 1296 games, Mersenne Twister dice gen. with seed 866958217 and quasi-random > dice > Play: 0-ply cubeful [expert] > Cube: 0-ply cubeful [expert] > > > > _______________________________________________ > Bug-gnubg mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/bug-gnubg >
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