Frame Sudoku puzzles by KrazyDad
Here are hundreds of free Frame Sudoku puzzles suitable for printing.
On this page you'll find four puzzle variants that all use Frame clues. These extra clues, on the outside of the main grid, indicate the sum of the outer three squares in the row or column adjacent to the clue. For example if a row contains the numbers 629345178, the left clue would say 17, which is the sum of 6+2+9, and the right clue would say 16, which is the sum of 1+7+8. The largest clue is 24, which means that the numbers must be 7+8+9, and the smallest is 6, which means the numbers must be 1+2+3.
Frame puzzles have the interesting property that the number of givens for the puzzle can be significantly smaller than a regular sudoku (and sometimes there are no givens at all). I've created a few additional variants here, all named after famous artists whose work was framed.
Each collection is ordered by difficulty, with the easiest puzzles in Book 1, and the hardest in Book 100. If you are new to these puzzles, I recommend you start with Book 1. If you find they are too easy, skip ahead by 10 books or so. If you find the puzzles are getting too hard, move up to Book #1 of the next volume, and they'll get easier again.
My puzzles are provided in 1perpage format. You can use the formatting option on the download page to produce foldable booklets that conserve paper and ink.
SPECIAL THANKS to programmer Phil Bordelon, who helped program and debug these variations.

Frame Sudoku Puzzles
Your basic frame. Clues outside the grid indicate the sum of the outer three squares in the row or column adjacent to the clue.Frame Sudoku, Volume 1
Frame Sudoku, Volume 2

Kandinsky Sudoku Puzzles
Frame clues combined with jigsawstyle pieces.Kandinsky Sudoku, Volume 1
Kandinsky Sudoku, Volume 2

Klee Sudoku Puzzles
Frame clues, jigsaw pieces and consecutive clues.Klee Sudoku, Volume 1
Klee Sudoku, Volume 2

Mondrian Sudoku Puzzles
Frame clues and four extra regions containing the numbers 19.Mondrian Sudoku, Volume 1
Mondrian Sudoku, Volume 2

Kahlo Sudoku Puzzles
Frame clues, jigsaw pieces, and four extra regions containing the numbers 19.Kahlo Sudoku, Volume 1
Kahlo Sudoku, Volume 2
Don't see the format you prefer? Run out of puzzles? Let me know!