The example in the EnforcePlayerTurns section is kind of buggy. Make an attempt to place two Xs in a row in different cells, then place an O in a third cell -

The example in the EnforcePlayerTurns section is kind of buggy. Make an attempt to place two Xs in a row in different cells, then place an O in a third cell - the second X you attempted to place will magically show up at the same time as that O.