Mental Floss

Brain Game: Xs without Os

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If your mind is still a bit foggy from the weekend, today's Brain Game should hopefully give you a quick jump-start. Good luck!

tic-tac-toe
tic-tac-toe /

Is it possible to place six X's into the tic-tac-toe gridabove without aligning three in a row in any direction?

Here is the ANSWER.

THE ANSWER:

Yes, it is possible, as shown here:

the solution
the solution /

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