Answer: It’s an old game on which Morra-board is based called ’Klunse’ in Danish, in English ’Odds and Evens.’ Each of the 2 players presents a clenched fist containing a few small stones, coins, or matches — both players take turns at guessing if the sum of the objects in the 2 hands is even or odd. The game is played in bars, so the one who loses buys drinks for everyone.