Tic-Tac-Toe Playing Chickens

In today's New York Times, there's a video clip about Tic-Tac-Toe Playing Chickens at a New York casino. I always thought that tic-tac-toe was spelled as such and not as the New York Times listed it: Tick-Tack-Toe. It's a funny clip, nonetheless.

http://video.nytimes.com/video/2012/06/10/nyregion/100000001595360/tick-tack-toe-playing-chicken.html