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Too good to double?

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06-04-2009 , 09:32 AM

Tuee

centurion

Join Date: Jul 2006 Posts: 164

Both positions are match to 7, score 0-0. Please ignore the shown dice-- assume black is on roll.

In both cases GNU is giving a very high gammoning percentage, but is choosing Double-Pass as the best choice. Seems with such a high gammoning percentage black should play for an undoubled gammon. Thoughts?

(This time, I even have the Jacoby rule turned off in GNU!)

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06-04-2009 , 01:53 PM

djk123

Pooh-Bah

Join Date: Jun 2005 Posts: 5,069

in the first case i think having the blot on the 1 point makes it not too good to double. you cover it like 78% of the time i think, but even when you cover it white can still anchor on the 3 point. plus ur inner board isnt that strong and u can't cover the 1 point and make the 5 point or 3 point all in 1 turn.

in the 2nd one, if u make the 5 point, then the blot on the 3 is still exposed and u won't be able to cover it for a while and in the meantime white could anchor on the 3. or if you cover the blot on the 3 point, white has a decent chance to anchor on the 5.

Last edited by djk123; 06-04-2009 at 02:07 PM. Reason: math error

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06-10-2009 , 12:14 AM

dsaxton

adept

Join Date: Oct 2005 Posts: 709

Even if your gammon chances are high, if your losing chances are high enough as well, the position won't be too good to double. Here with a blot in your inner board, 4 men back, and your opponent preparing to anchor as well as having a 3 point board, I can you losing quite a few games, so it makes sense that this position would be double / pass.

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