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