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Cube decisions that the bots can't fathom

Posted By: Timothy Chow
Date: Wednesday, 2 November 2011, at 5:54 p.m.

Recently, in the context of discussing something else, Stick mentioned the following position:

Money Game
Blue on roll. Cube action?
White345

Blue75
GNUBg Id: AADg+z74vg8AAA:cAkAAAAAAAAA
XGID=-eeeEEE-------------------:0:0:1:00:0:0:0:0:10

(Strictly speaking, Stick didn't pose it as a cube problem, but gave White the cube and presented it as a backgammon variant.) This reminded me of Problem 100 in Paul Lamford's book Improve Your Game, which I recently purchased and have been working through:

Money Game
Blue on roll. Cube action?
White330

Blue60
GNUBg Id: AAD4fD4+nw8AAA:cAkAAAAAAAAA
XGID=-eEeEeE-------------------:0:0:1:00:0:0:0:0:10

Lamford says that the proper cube action here is D/T. Do you agree? What about in Stick's position—also D/T? Can you estimate wins/gammons/backgammons and White's recube efficiency?

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