. . . "AR or AmRo"@en . . . "American rotation, abbreviated AR or AmRo, is a pool (pocket billiards) game. It is a modern, tournament-oriented, call-pocket, call-safe variation on traditional rotation pool (or 61), devised to increase the degree of difficulty of the sport. It is the \"flagship game\" of the American Billiard Club (ABC), a division of CueSports International (CSI)."@en . . "Cue sports"@en . .