Connect6 introduced in 2003 by Professor I-Chen Wu at Department of Computer Science and Information Engineering, National Chiao Tung University, is a two-player strategy game similar to Gomoku.

Two players, Black and White, alternately place two stones of their own colour, black and white respectively, on empty intersections of a Go-like board, except that Black (the first player) places one stone only for the first move.

The one who gets six or more stones in a row (horizontally, vertically or diagonally) first wins the game.