double dominoPrintable Domino Double-Twelve Set. Combinations of the numbers 1-12 are listed as pips on the two halves of each of the tiles in this extended dominoes set. Download in PDF Format (free!)Dominoes is a game that requires strategy, observation, and careful planning. It can be played with 2 to 4 players and is suitable for all ages. Whether you're a beginner or an experienced player,