Editing 832: Tic-Tac-Toe
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| titletext = The only winning move is to play, perfectly, waiting for your opponent to make a mistake. | | titletext = The only winning move is to play, perfectly, waiting for your opponent to make a mistake. | ||
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==Explanation== | ==Explanation== | ||
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+ | Pixel values are taken from http://xkcd.com/832_large/. | ||
Each map shows every possible combination of moves which will result in that side winning or tying. It assumes that X moves first, and its optimal move is X7. Any corner would do, so X1, X3 and X9 are also optimal moves. The map for X has a big red X7 (650×650 pixels), and the 8 remaining grids have a smaller (210×210) black X7. | Each map shows every possible combination of moves which will result in that side winning or tying. It assumes that X moves first, and its optimal move is X7. Any corner would do, so X1, X3 and X9 are also optimal moves. The map for X has a big red X7 (650×650 pixels), and the 8 remaining grids have a smaller (210×210) black X7. | ||
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* X3, O5, X8, O7, X2, O1, X9 (winning move would be O4, Map says O6); | * X3, O5, X8, O7, X2, O1, X9 (winning move would be O4, Map says O6); | ||
The same on six other symmetrical games to the above. | The same on six other symmetrical games to the above. | ||
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==See also== | ==See also== |