About Daily Sudoku #840
Daily Sudoku #840 was the puzzle for Tuesday, October 20, 2026, a medium one: a 9 × 9 grid with 31 given digits. Everyone who played Daily Sudoku that day got the same puzzle, and it stays here to play for 60 days.
New to Daily Sudoku? The rules, tips and common questions are on the Daily Sudoku page, and How to Solve Sudoku: A Beginner’s Guide goes into strategy.
Other days of Daily Sudoku
- Daily Sudoku #843, Oct 23
- Daily Sudoku #842, Oct 22
- Daily Sudoku #841, Oct 21
- Daily Sudoku #839, Oct 19
- Daily Sudoku #838, Oct 18
- Daily Sudoku #837, Oct 17
- Today’s puzzle, #851
Every day of the last 60 is in the puzzle archive.