Game tic-tac-toe. You can select the classic 3x3 field, as well as 10x10 and 19x19. You need to build a row of three consecutive crosses or zeros - for 3x3 three and for 10x10 and 19x19 five in a row. You can play with an opponent both on one device and over the network, as well as practice in a game with artificial intelligence. Good luck