
Task

Play a game of tic-tac-toe.

Ensure that legal moves are played and that a winning position is notified.


Tic-tac-toe   is also known as:

   naughts and crosses 
   tic tac toe 
   tick tack toe 
   three in a row 
   tres en rayo       and
   Xs  and  Os


See also
   MathWorld™, Tic-Tac-Toe game.
   Wikipedia tic-tac-toe.


9	С/П	ПП	28	пи	*	cos	x<0	16	ИП2
ПП	28	1	-	БП	51	ИП7	ПП	28	ИП7
ПП	28	КИП2	ИП2	ВП	4	4	С/П	1	-
x=0	33	8	П2	С/П	П7	ИП2	4	-	x#0
43	x<0	45	8	+	П8	ИП7	-	x#0	55
ИП8	ВП	6	6	С/П	ИП2	В/О