31

This number is a prime.

Just showing those entries submitted by 'Merickel': (Click here to show all)

+ Just two 1st-move pairs in a chess game yield a maximum of 31 legal 2nd-move options for White: White's double advance of King's Pawn followed by either of 2 double advances resulting in an option to capture. [Merickel]

(There are 4 curios for this number that have not yet been approved by an editor.)

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