Given this tic-tac-toe position, as played by two expert players, who went first and where? Also, which was the last "move"?

 X | O | O 
---+---+---
   |   | X
---+---+---
   | X | O

(An expert player is a player who would never play in such a way that would allow his opponent to win, and who would also try to get the possible best result.)

(In reply to No Subject by Phen)

Please see Tristan's comments, and my earlier ones... if the first two moves were O in top-middle, and X in middle-right, then O has a win:

O in center, x in bottom-center (forced), O in upper-right, and win on next move.

Since O didn't go in the center, this is an impossible scenario.

Posted by Thalamus on 2004-05-07 18:03:03