This is a mixture of Lines and Sudoku games with simple rules. Place digits next to each other so that their sum makes up 10. If the sum is correct the digits disappear and you unlock the field tiles. For example, you should click 7 and then 3. Both digits will disappear from the playfield. When there are no digits that make 10 together new digits will appear randomly in the empty tiles. All you need to play this puzzle game is simple Math.