→ O9 → X3 → O2 → X8 → O4 (7) → X7 (4), this game will be a draw. X1 → O5 → X6 → O9 → X7 → O4 → X2 (3) → O3 (2) → X8, this game will be a draw. X1 → O5 → X6 → O9 → X8 → O2 (3, 4, 7) → X4/7 (4/7, 2/3, 2/3) → O7/4 (7/4, 3/2, 3/2) → X3 (2, 7, 4), this game will be a draw. In both of these situations (X takes 9 or 6 as the second move), X has a property to win. If X is not a perfect player, X may take 2 or 3 as a second move. Then this game will be a draw, X cannot win. X1 → O5 → X2 → O3 → X7 → O4 → X6 → O8 (9) → X9 (8), this game will be a draw. X1 → O5 → X3 → O2 → X8 → O4 (6) → X6 (4) → O9 (7) → X7 (9), this game will be a draw. If X plays 1 opening move, and O is not a perfect player, the following may happen: Although O takes the only good position (5) as the first move, O takes a bad position as the second move: X1 → O5 → X9 → O3 → X7, then X can take 4 or 8 to win. X1 → O5 → X6 → O4 → X3, then X can take 7 or 9 to win. X1 → O5 → X6 → O7 → X3, then X can take 2 or 9 to win. Although O takes good positions in the first two moves, O takes a bad position in the third move: X1 → O5 → X6 → O2 → X8 → O3 → X7, then X can take 4 or 9 to win. X1 → O5 → X6 → O2 → X8 → O4 → X9, then X can take 3 or 7 to win. O takes a bad position as first move (except of 5, all other positions are bad): X1 → O3 → X7 → O4 → X9, then X can take 5 or 8 to win. X1 → O9 → X3 → O2 → X7, then X can take 4 or 5 to win. X1 → O2 → X5 → O9 → X7, then X can take 3