A Game Of Circles And Crosses

Most of you know this mathematical game, of course. you and friend draw crosses and on a sheet of a paper. you do it one after another.The first pupil who gets three marks in a row wins. but do you know that you can play this another way and it will become more interesting? You must try to make your friend win.1 If you get your three marks in a row, you don't win-you lose!

It is more difficult to play this game the other way. The second pupil can always win (if he plays the right way), but he may not win if the first pupil begins with his mark in the center. Then, if the first pupil always takes a place on the other side of his friend's mark, nobody will win, as in the game which you see in the picture.
It your friend does not know the secret which we have explained, you must play each time so as to leave him the greatest number of ways to win. You may try a few games and you will see how interesting it is to play the game this way.