Featured Puzzle: Hoshi (Star Sudoku) #1
Fill the triangles in the grid with the numbers 1-9 so that there are no duplicates in any large triangular region or along any stripe of cells, even those that skip over the middle.
Featured Puzzle: Hoshi (Star Sudoku) #2
Fill the triangles in the grid with the numbers 1-9 so that there are no duplicates in any large triangular region or along any stripe of cells, even those that skip over the middle.
Featured Puzzle: Jigsaw Sudoku #2
September 9th is International Sudoku Day! So, today’s puzzle is Jigsaw Sudoku. The rules are pretty much the same as regular Sudoku, with irregular regions instead of 3×3.
Featured Puzzle: Killer Jigsaw Sudoku
“I want to play a game.” Jigsaw has scrambled the regions of a Sudoku grid and placed all the answers in cages! Can you still solve it?
Featured Puzzle: Sukaku #1
Sukaku is an interesting variant of Sudoku. Rather than the standard format of revealing a few known numbers, you are instead given pencilmarks. As a matter of fact, another name for this puzzle is Pencilmark Sudoku. Otherwise, normal Sudoku rules apply. Fill the grid with 1-9 in such a way that no row, column, or 3×3 region contains a duplicate.
Featured Puzzle: Tridoku #1
Season’s greetings! Today, we have a Tridoku puzzle. In this Sudoku variation, fill in each large triangle with the numbers 1-9 with no repeats. Also, you may not use duplicates in the legs of the highlighted outer or inner triangles.