Checkers is a video game for the Intellivision based on the board game of the same name. Being produced on a console that's of the same generation as the Atari 2600, the opponent AI takes a while computing possible moves to take against you. Unlike the Atari 2600 version, it takes much less time to do so and it doesn't cut to a black screen while it computes.
Winslinator carefully uses moves that minimize the time the AI takes to compute its moves and beats it in record time.