Now let us consider O moving to a nonadjacent side after X moves in a corner. X__/X__/X__ ___/___/_X_ ___/_O_/_O_ X__/X__ _X_/_X_ _OO/XOO Again, X can move in the center, which again forces a situation where X is threatening a win in two places. X may win here, as well.
X corner -> O adjacent -> X may win X corner -> O nonadjacent side -> X may win
