Which game dates back to at least the Roman Empire: Nine Men's Morris, or Icehouse pieces?
Icehouse pieces Icehouse pieces, or Icehouse Pyramids, Treehouse pieces, Treehouse Pyramids and officially Looney Pyramids, are nestable and stackable pyramid-shaped gaming pieces and a game system. The game system was invented by Andrew Looney and John Cooper in 1987, originally for use in the game of Icehouse.
Hockey 9s Hockey 9s or Hockey Nines is a variation of the sport of field hockey played at international level. While played on a standard size hockey field, there are a number of variations in its rules, most significantly the reduction of number of players on a team from eleven to nine.