Problem 44851. X O X Oh!

This follows on from problem 44850 - X O X O

On a noughts and crosses board, how many possible unique combinations are there given a square grid of length n?


  • All squares are populated.
  • Number of naughts and number of crosses can only differ by a maximum of 1 I.E. The game was played until the board was full.
  • A solution with more than one "win" cannot be valid as the game would have finished before the board was full!

Solution Stats

36.36% Correct | 63.64% Incorrect
Last Solution submitted on May 06, 2019

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