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Solution to Nack's retro puzzle

Posted By: Nack Ballard
Date: Monday, 5 May 2014, at 12:43 a.m.

In Response To: Solution to Nack's retro puzzle (Timothy Chow)

Congratulations, Tim!

As this is supposed to arise from a legal backgammon sequence, the opening play must be non-doublets. I suspect you just forgot. That can be easily fixed by switching your first- and third-roll plays (made by White).

Your statements about order of plays are accurate and appear to be complete. It is also true that White must play first (I've proved it).

Blues 66 and 22 are always interchangeable but do not have to be his first two rolls. Blue's set of rolls (66 55 44 22) is unique, but White's is not.

I've already (essentially) written a complete solution post, but the only copy is on my main computer. I'll finish and send it after returning home, in about ten days.

Nack

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