Nought-or-Cross is Tic-Tac-Toe played on a three by three board with the twist that we specify whether the opponent is to next place a nought or a cross; the first to get three in a line of the same symbol wins.

In this version of Tic-Tac-Toe you do NOT own the tokens 'X' or 'O'; either player can play both types of tokens.
The first player places a cross on the main board (by clicking it), then clicks the small 'x' or the small 'o' on the right border.
Then the second player first clicks a free position on the left board and thereby creates the type of token prescribed by the first player and so on.