David and Angela play a game of tick-tack-toe. In this game, the players try to get three circles or three crosses in a row (horizontal, vertical, or diagonal).

They follow the following rules:

• A player always tries to win: if a player can place his own symbol (X or O) in a row that already contains two of his own symbols, he will do so.
• A player always tries to avoid that his opponent wins: if a player can place his own symbol (X or O) in a row that already contains two of the symbols of his opponent, he will do so.

Of course, the first rule has precedence over the second rule, because the game can be won in this way.

In the game shown below, six moves have been made. David plays with crosses (X) and Angela plays with circles (0). However, we do not know who started the game.

The question: Who will win this game?

The answer: Click here!