****New launch special -- FREE version for 5 days only.
Do you like math, come and take a look at this game. It definitely challenges your math skills. The goal of the game is to keep the sum of the rows and columns as close as possible to zero. At every turn, you must enter a number in a free cell. In classic mode you can not enter the same number in two adjacent cells. In Sudoku-Like mode you can not enter the same number more than once in a row or column. The cells marked with symbol -:subtract the number, those with +: sum it. Indeed, you should have a try.