A strategy board game for 2 players by Ethan Larson.
Linkage is played on a 7x7 board with the center square blacked out. There are 24 pieces, 6 of 4 different colors. Each piece is a domino covering exactly two cells of the board. Both players use exactly the same pieces. The starting player is called "More" and the other player is called "Fewer". The goals of the game are opposite for both players. The "Fewer" player wins a finished game if the number of distinct groups of cells of the same color is less than 12. Otherwise the "More" player wins.