Cells with gray circles must contain odd digits, cells with gray squares must contain even digits. Also called "Compdoku".Įven-Odd Sudoku: fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9. In addition, greater than or less than signs (">" or "<") in the walls indicate that one cell's number is greater than or less than an adjacent cell's number. Greater Than Sudoku is the variation of the original sudoku. This variant also called "Sums Sudoku", "Sums Number Place", "Samunamupure", "Kikagaku Nampure". In Killer Sudoku, sub-regions have specified sums, and no number can be repeated within a region. In Anti Diagonal Sudoku each diagonal has at most three different digits.
In Anti-King Sudoku ( "Touchless Sudoku") equal digits can be neither orthogonally nor diagonally adjacent. In Anti-Knight Sudoku all cells at a chess knight move (at a distance of 2 by 1) must hold different numbers. The group of 9 cells with the same color must also contain digits 1 through 9. Sudoku-DG ( "Offset Sudoku") contains 9 disjoint groups in the puzzle, one for each relative box position.
It is called Windoku ( "Four-Box Sudoku", "Hyper Sudoku"). This format was first introduced in the Dutch newspaper "NRC Handelsblad" by Peter Ritmeester. Sudoku may contain additional four regions 3 x 3. This region must contain digits 1 through 9. (Girandola is a kind of revolving firework.)Ĭenter Dot is a variant of sudoku, where central cells of each region form an extra region. This group must also contain digits 1 through 9. Girandola is an ordinary sudoku with one extra group of cells. Those nine cells must also contain 1 to 9. In Asterisk Sudoku there is an additional area, shown on the grid by shading nine specially selected cells. Once the grid is complete, the hidden word may be revealed. Godoku (also known as "Wordoku", "Alphabet Sudoku") is similar to sudoku, but uses letters instead of numbers. The argyle pattern is derived from the tartan of Clan Campbell, in eastern Scotland.Īlso the puzzle may contain the regions of random (irregular) shape this variant is called Jigsaw Sudoku ( "Geometry Sudoku", "Geometry Number Place", "Irregular Sudoku", "Kikagaku Nanpure"). Use the check box Diagonals for such sudokus.Īrgyle Sudoku contains additional diagonals every marked diagonal line contains each digit not more than once. This variant is called Sudoku X ( "Diagonal Sudoku").
In some sudokus main diagonals also contain the digits 1 through 9. Each number in the solution therefore occurs only once in each of three "directions", hence the "single numbers" implied by the puzzle's name.Ĭross+A can solve and create many kinds of sudokus. The goal is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 through 9 exactly once. Some cells already contain numbers, known as "givens". The puzzle is most frequently a 9 x 9 grid made up of 3 x 3 subgrids (called "regions"). Sudoku (also known as "Number Place") is a placement puzzle.
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