In pair-up puzzles the player has to match tokens, usually two at a time.
The matched tokens are usually taken from the board, and the player wins when the board is empty.
... 98.12% White, 0.00% African American, 0.06% Native American, 0.58% Asian, 0.00% Pacific Islander, 0.26% from other races, and 0.97% from two or more races. 1.88% of the ...