Place the numbers 1-9 in the boxes so that the difference of each pair of numbers joined by a line is at least three. The number 8 has already been placed.

(In reply to Thanks to Ady and Justin by ed bottemiller)

Ed,

Thanks for the thanks.

I share your views.

One of my problems, still in the queue, asks to specify the total time the solver had  spent to get the right answer.

Regards

ADY

Posted by Ady TZIDON on 2010-08-06 15:40:05