The most ordinary game, tic-tac-toe, play with the friend or against phone
One of players plays "crosses", the second — "zeroes".

Features of a tic tac toe:
- A game in yours
- A game with phone
- The convenient field 3 on 3

Rules of the game:
Players in turn put signs on free cages of the field 3х3. The first, built in a row 3 figures down, horizontals or diagonals, wins. The first move is made by the player putting crosses.