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.)
I can't remember if 'X' is required to go first or not, but, if 'X' isn't required then...
Assume the positions on the board are as follows:
A | B | C
-----------
D | E | F
------------
G | H | I
And Player 'J' places the X pieces and Player 'K' places the O pieces. K places an 'O' at I, J places an X piece at H, K at C, J at F, K at B, and J at A.
solution
