Board Games at Odum: Pente

Pente is an abstract strategy game. Players place glass markers on intersections of a 19-by-19 grid (the same as in Go). The object of the game is to get five of your own markers in a row (4 with more than 2 players) or capture five pairs of your opponent's pieces. The first to do either wins. Capturing takes place when exactly two pieces are sandwiched between pieces of the opposite color. There are multiple variations of the game for greater challenge and complexity.

Description from Boardgamegeek.com