Mathematic think and logic game. Each player gets the same set of numbers (1 and 2 digits). He shuffles them and takes new that he has again 12 numbers on his hand each round. The player adds 3 stones to his Hand if he cannot do anything on his turn. The game board shows places for the numbers and the 4 base calculations between them. Additionally there are rows of number fields, where the player can place series of numbers with always the same difference. On players turn he can place whole valid calculation, or a part of a series of 3 or more numbers (with the same difference). A third possibility is to continue a series. The actual player places as much as he can. If something is wrong, he gets the numbers back and the next player has his turn. The game ends after the round when the first player has placed all his numbers. The player without Stones wins. If more than 1 has finished the one with the less number of used special marked field wins.