Clackerjack is a climbing game that is played with two sets of double-six dominoes. It can be played by four players, in fixed partnerships, or by two players, in a head-to-head duel. The blank tiles, which are all wilds, get distributed equitably between the two sides; each player then draws their own hand of tiles from the boneyard. The goal is to ditch all of these dominoes through the skillful play of combinations and bombs. Lots of bombs.