Tic-Tac-Toe new generation

I want to tell you about a tic-tac of the new generation, playing in which you will forget about the old version of the game once and for all.

Play tic-tac-toe is not too interesting. Indeed, after two or three moves clear who will win. Mathematicians have approached this problem with a fair portion of creativity and created a new version of the game. And it's cool!

Two good player tic-tac-toe will always play a draw. By "good players", I mean people who are more than five years and who have a brain, because to understand the conditions of winning a tic-tac-toe - it ten minutes.

So, the game always ends with this:

And now let's look at an updated version of noughts and crosses.

Rules of the game

Board game looks like. That is, in every cell of the usual playing field is another field.

1. Making a move, you put a cross or a toe, as usual.
   
2. When you line up three of his pieces on a small field, you win (on it).
   
3. To win, you need to win in three small fields in a row.
   

The rules are simple and interesting, but there is one more important point.

You do not choose which of the nine fields of play. This is determined by the course of the previous opponent.

That is, if the opponent put a cross here ...

... you have to make a move here.

This makes the game a strategic element. You can not only focus on a small field - you need to understand how your move will affect the course of the next opponent.

As a result, to predict the outcome of the game is almost impossible to play it much more complicated, more interesting and longer than in the normal version.

Somewhat less important rules:

1. What if the opponent has sent me on the field, which has already won? Then you can select any of the fields on your own.
2. What if the small box draw? Then it is not considered at all, but you can negotiate and take it into account and how to cross-stitch and how to toe.

Rules common tic-tac-toe is poor. The game described above, and is the very best. Agree, cool!

The game was invented by Ben Orlingom, author of the blog Math with Bad Drawings.