This game sucks. There are over forty different pieces. So even though they give you three at a time, it is impossible to keep track of all the possible pieces and plan ahead and/or create a strategy. The pieces can be from one to five squares. And they can not be rotated. By comparison, Tetris has only 7 pieces. They are all only 4 blocks. And when you include the rotations, there are only 23 possible shapes. And Sudoku, the game from which this game takes its name has only 10 possible numbers to use. The game is more chance of what pieces you get than actual skill.