Printable Diagonal Sudoku, OniFree, with answers: 300 puzzles

Every column, every row and every bold 3×3 box holds each digit 1 to 9 once. So far it is the same as classic sudoku. Every puzzle is free and prints large on A4, with the answer on page 2.

Diagonal Sudoku MediumDiagonal Sudoku HardDiagonal Sudoku Oni

What Diagonal Sudoku Oni is like

Uses techniques that span the board, such as the X-Wing and XY-Wing. Clues average 21.9.

See the Diagonal Sudoku rules and other levels →

Today's puzzle (11/13, No.152)

Changes every day at 0:00 Japan time. Print it as it is.

Solve on phone or PC →

Diagonal Sudoku Oni No.152puzzlelounge.app/nanpure

Every column, row and bold 3×3 box, and each of the 2 coloured diagonals, holds each digit 1 to 9 once.

See the answer

Answer to Diagonal Sudoku Oni No.152

Diagonal Sudoku Oni: all 300 puzzles

Choose a number to print that puzzle. The same number is always the same puzzle.

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300

Questions

Is it really free?

Yes. No sign-up is needed, and every puzzle is free to print.

Are answers included?

When printed, page 2 is the answer. If you do not want the answer, choose page "1" only in your print settings. On screen you can check it with "See the answer".

Is there only one answer?

Yes. Every puzzle has one answer and has been checked to be solvable by logic alone, with no guessing.

Can I also solve on a phone?

Any puzzle can be solved in your browser from "Solve on phone or PC". Notes and hints that teach how to solve are available too. At this level the browser takes a ticket per puzzle (none needed with the Lounge Pass). Printing is free at every level.

What are the rules of Diagonal Sudoku?

As in classic sudoku, every column, row and 3×3 box holds 1 to 9 once each. On top of that, the 9 cells on each of the 2 diagonals, corner to corner, also hold 1 to 9 once each.