Sudoku: Verdrehte Blöcke is another title in Knizia's Sudoku series of games. You have 9 squares with 4 numbers on the front and 4 numbers on the back, and 9 angles with 5 numbers on the front and 5 numbers on the back. Players place the squares and angles down following the rules of Sudoku. There are squares and angles in 4 colours. This allows 4 players to play simultaneously. The player to solve their Sudoku board first wins.