Tri-Logie

Abstract game. There are 49 double-sided pieces on the board, each consisting of 2 pieces glued together. One color is up, the other one is down. The active player replaces one of the pieces with the 50th piece, trying to create a line of exactly three adjacent pieces of the same color. The other player contiunues with the replaced piece. The player who cannot create a correct line, loses the game.