Catkuby Raimon Parreño Today's Catku Play and print How to play The books Español

Free, for pencil and paper

Killer sudokus to print

A new one every day, free, no sign-up

A different 9×9 killer sudoku every day, ready to print and solve with a pencil. Free, no sign-up.

Killer is the sudoku you know with the clues taken away: the grid is split into cages, and each cage says in its corner what the numbers inside add up to, with no digit repeating inside a cage.

Every grid is checked by computer: one solution, and never a need to guess.

Generate and print

It opens the puzzle page, draws a new one and brings up your browser's print dialog. The sheet comes out in English; the rest of that page is still in Spanish.

And on paper, properly

If you like doing them with a pencil, there is a whole book: 202 Killer Sudoku, paperback, 8.5 × 11 inches, with big grids and the answers at the back.

And there is a new Catku every day on this site, free, with the other five to play or print.

Play today's

The other puzzle books

Cover of 202 Sudoku202 Sudoku Cover of 127 Sudoku 16×16127 Sudoku 16×16 Cover of 202 Killer Sudoku202 Killer Sudoku Cover of 101 Nonograms101 Nonograms Cover of 152 Kakuro152 Kakuro Cover of 102 Catkus102 Catkus