Sling-Do-Ku is the combination of a slot machine mechanic and the traditional Sudoku Puzzle. The game is played on a traditional Sudoku puzzle board, with the addition of a slot reel for each column. Underneath each column with empty spaces is a reel mechanic where numbers are spun like a traditional slot reel and are entered into play. The player can choose to place the number on the board or pass on placing it for that spin. At the end of the turn the player’s number placements are submitted. Each player receives a score based on several factors dependent on how well they played. Each score gets converted to Slingo Coins that a registered member can use to enter $50, $200 or $1000 sweepstakes on slingo.com. One ticket for a sweepstakes entry will cost a player 5,000 Slingo Coins.