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Backgammon Boot Camp #1-21 (High anchors and holding games) -- Rollouts

Posted By: Taper_Mike
Date: Thursday, 22 January 2015, at 4:56 a.m.

In Response To: Backgammon Boot Camp #1-21 (High anchors and holding games) -- Rollouts (Casper Van der Tak)

Thanks Igor for a very informative post.

Yes, indeed! Very nicely done.

When I took a good look at the standard 20pt holding game (8pt and 13pt owned outside, 4 or fewer checkers on the midpoint), I determined that a race lead of 16-17%, together with some flexibility, was very nearly the cusp of an initial double/take. When all spares are stripped away, I knew the same position was not a double. However, I never checked to see what kind of racing lead might turn it back into a cube.

Without checking, I applied the same rules to the standard 18pt holding game. Obviously, I need to do some homework there.

I like your reference position showing that a lead of 20% in a stripped 18pt holding game is enough to offer an initial double. I am adding it to my repertoire.

Although the OP is a technical double, moving White's gap just 1 point lower, while holding his pip count constant, is all it takes to find tipping point. According to this XGR++ eval, that is a razor-thin D/T. Any further improvement for White turns it into a ND.

Mike

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