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	J A M E S   C H I P 

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Theoretically Infinite Noughts and Crosses

In the standard version on Noughts and Crosses if each player makes optimal

moves every game will end in a draw. TINC differs from this in the way that

if both players make optimal moves theoretically the game could carry on to

be infinitely big and continue being played until the end of time.

How

A turn in a game of TINC has three phases.

To win a player must create an unbroken line, orthagonal or diagonal,

of more than one of their symbol from one side of the grid to the other.

Playes go back and forth taking turns trying to win.

Setup

Place up to two symbols

Check for a win

After you have placed your symbols on the grid you then check to see if

either player has won. If a player has won then the game ends here, do not

proceed to the next phase.

Expand the grid

If at the end of a turn no player has won and there is a symbol of either

type touching the edge of the grid then the grid expands. Grow the grid by

one cell in each direction.

Play Example

In this example an X is a cross that has been placed in a cell a O is a

nought that has been places in a cell and a ~ is an empty cell.

Turn one.

On this turrn there is only one space available, the player must place their

symbol here.

	~	->		X

We can see at this point the player has not won so we check to grow the grid.

As there is a symbol against the edge of the grid then we expand it one cell

in each direction.

				~~~
	X	->		~X~
				~~~

Turn two

Ont his turn the next player may place up to two of their symbols on the

grid.

	~~~				~~~
	~X~		->		~XO
	~~~				~~O

Again we check to see if either player has won. As they have not we grow

the grid again!

					~~~~~
	~~~				~~~~~
	~XO		->		~~XO~		
	~~O		 		~~~O~
					~~~~~

An the game continues as such.