RULES
- 21 Kreuzer, also known as Mermaid Tail, Revenge of the Sea Serpent or Pyramid, is a dice game. Each player places 21 kreuzers (coins) as a stake in front of him, in the form of a pyramid with the base of 6 coins and rows above each with one less coin.
- The dice are rolled in turns; each player may remove the row whose number he threw from his pyramid.
- Whoever cleared his pyramid first has won and receives all coins remaining on the table as a prize.