5

This number is a prime.

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In chess, the "rule of 5" is for positions in which the pawn is protected and the opposing king is cut off by files: Add the number of rank of the pawn to the number of files the defender's king is cut off. If the sum is more than five, it is usually a win. Otherwise it is normally a draw. [Soltis and Mednis]

Submitted: 2018-12-11 23:19:00;   Last Modified: 2018-12-11 23:20:07.
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