thumb|Seven-ball rack showing specially designed 7 ball. Seven-ball is a pool game with rules similar to nine-ball, though it differs in two key ways: the game uses only seven as implied by its name, and play is restricted to particular pockets of the table. William D. Clayton is credited with the game's invention in the early 1980s.
thumb|Seven-ball rack showing specially designed 7 ball. Seven-ball is a pool game with rules similar to nine-ball, though it differs in two key ways: the game uses only seven as implied by its name, and play is restricted to particular pockets of the table. William D. Clayton is credited with the game's invention in the early 1980s.
==Rules== At the start of the game, balls one through seven are in a hexagonal configuration, with the 1-ball placed at the rack's , centered over the table's , the 7-ball placed at the rack's center, and all other balls placed clockwise (see photo top right). Immediately following the , the opponent must elect three pockets along one of the table's , and the player who broke is automatically assigned the three pockets situated along the opposite long rail. Once that selection is made, balls 1–6 may be in any pocket in rotation, starting with the one, as the object ball. Balls pocketed via combinations off of the object ball are legal. The 7-ball must be pocketed in player's assigned side to be a legal win. Scratches on any object ball allow the opponent ball-in-hand, but the sunk ball remains potted. Scratching on the 7-ball is a loss. Pocketing the 7-ball in any other pocket than one on the called side is a loss.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).