3-Chain was created by GameIntellect.com
Two players take turns placing chips on a square board. All chips are identical. As in tictactoe, the player to obtain three contiguous chips in a row (vertically, horizontally, or diagonally) wins the game.
According to the author, second player always has a chance to win, but is at a slight disadvantage.
To make a move you must click on the chosen square. After every move the program marks all the squares where you must not put your chips.
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