The timeless tile game, match the pips, work the open ends, and shed your hand before the computer does.
Play block dominoes against the CPU. On your turn, lay a tile whose end matches one of the open ends of the line. If you can't match, draw from the boneyard until you can. The first player to empty their hand wins the round.
Dominoes are Chinese before they are anything else, and they began life as something closer to cards than to the tiles most players picture. A recognisable version of Chinese dominoes had developed by the 12th or 13th century.
The oldest written mention is 13th-century and comes from Hangzhou, where pupai — gambling plaques — are listed among the goods sold by peddlers during the reign of Emperor Xiaozong of Song. The term is ambiguous there, but a Ming author uses the same word two centuries later in a passage that unmistakably describes domino tiles.
The traditional Chinese set of 32 pieces is built on a different principle from the European one: it represents each possible face of two thrown dice, so it has no blanks at all. The blank-bearing set most of the world now plays with is the later, Western rearrangement of the idea.
Dominoes is the classic public-domain tile game, rebuilt here as an original, free browser version with a single-player CPU opponent.