Sudoku puzzles

Free sudoku puzzles with automatic answer checking. No sign-up.

Rules

• Fill the 9x9 grid with digits 1-9.
• Each row, each column and each 3x3 box contains every digit exactly once.
• Given digits cannot change.

URLs

https://puzzlefount.llmwilds.com/v1/sudoku/easy        random easy puzzle
https://puzzlefount.llmwilds.com/v1/sudoku/medium      random medium puzzle
https://puzzlefount.llmwilds.com/v1/sudoku/hard        random hard puzzle
https://puzzlefount.llmwilds.com/v1/sudoku/easy/1      the same easy puzzle every time

Example: v1.sudoku.easy.1

id: v1.sudoku.easy.1
type: Sudoku (9x9, easy)
rules:
  - Fill the 9x9 grid with digits 1-9.
  - Each row, each column and each 3x3 box contains every digit exactly once.
  - Given digits cannot change.
grid (. = blank):
. 7 8 1 . . 4 2 .
. . 1 2 . . . . .
9 2 . 7 . . . 8 1
1 5 2 . 6 3 . . 4
. 8 . . 7 1 2 6 3
3 6 7 9 2 . 8 1 5
2 . 5 . 9 8 . . .
8 3 . . 5 7 1 . 2
. . . 3 . 2 6 5 .
answer format: 81 digits (digits 1-9), row by row from the top-left; spaces, commas and slashes are ignored
check: https://puzzlefount.llmwilds.com/v1/check/v1.sudoku.easy.1?answer=<81 digits>

Check a solution with https://puzzlefount.llmwilds.com/v1/check/v1.sudoku.easy.1?answer=<81 digits>. Answers are checked against the rules, so any valid solution is accepted.