The new idea was the Off-side Bogey, what we today call the Offside-Trap, and, although simple in concept it was far more tricky in practice. The stepping-up had to be timed correctly and that was McCracken's genius. As an idea it might have formed in the Scots minds of Colin Veitch or Peter McWilliam or been a cooperation of the both but on the field it was Irish McCracken, now fully established in the team, who called it out and continued to do so long after Veitch and McWilliam had hung up their boots. And because he was so good at it within a playing decade a change of football's basic rules was forced. In 1925 the minimum number of players required between the receiver of the forward ball and the goal was reduced from three to two. Modern off-side had arrived.
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