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Seven-point prime puzzle: Solution

Posted By: Matt Cohn-Geier
Date: Thursday, 29 April 2010, at 11:40 p.m.

In Response To: Seven-point prime puzzle: Solution (Nack Ballard)

Can the rolls be played in any order? Yes! Granted, I cannot (for example) play a 3 from 7/4 until a 6 has been played 13/7, nor the second 3 from 8/5 without the support of a 5 played 13/8, but if I roll 33 first from the initial position, I play 13/10(3) 6/3, and then play two 5s to the 5pt and one 6 to the 4pt as the rolls occur. What matters in this case is that two 3s and two 5s are combined to travel from 13pt to 5pt, and that one 3 and one 6 are combined to travel from 13pt to 4pt; in that way, any order can be handled.

There are other solutions as well. For example you can still make the prime even if you play 23/20 with one of the 3s.

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