> Right, but the letters are presented in a particular order:
> "ACG". It would make sense for that to be the order of the moves
> in the game, with players one (marked in red) and two (green) alternating
> moves. D is the only response that would make sense for player two. The
> best next move for the first player is space I. This seals the win because
> the second player can't block both the bottom row and the upper-left to
> lower-right diagonal at the same time (spaces E and H). I'm pretty sure
> that there is no better set of moves for either player given this layout.

> Here's the board again, for reference.

>   A    B    C     D  
>  E   F    G    H 
>  I  A C G ... D ... I

I keep on thinking back to what chelsea said about there being more than one way to play. If that is true then I think that maybe the answer is " I " because it is the only other corner left.