Which game dates back to at least the Roman Empire: Nine Men's Morris, or Icehouse pieces?
Nine Men's Morris Nine Men's Morris is a strategy board game for two players dating at least to the Roman Empire. The game is also known as Nine Man Morris, Mill, Mills, The Mill Game, Merels, Merrills, Merelles, Marelles, Morelles and Ninepenny Marl in English. The game has also been called Cowboy Checkers and is sometimes printed on the back of checkerboards. Nine Men's Morris is a solved game in which either player can force the game into a draw.
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.