Copyright (c) 1965 Universal Games, Inc.
Gambit is played on a 9x11 square board with the following setup (I'm not 100% sure if it's the right one):
If it is Black's turn, he should play f1 to f2, making a line of strength 3 (the King is worth 2) capturing the green line with strength 2 (i.e., the soldiers f4 and f5).
If it is Green's turn, he should move his King south to f6, making a line with strength 4, capturing the opponent King and thus, winning the game.
The column capturing is similar to Epaminondas, but Gambit's move mechanics makes it a much slower game.