About Calcudoku #836
Calcudoku #836 was the puzzle for Friday, October 16, 2026, a medium one: a 5 × 5 grid in 9 cages. Everyone who played Calcudoku that day got the same puzzle, and it stays here to play for 60 days.
New to Calcudoku? The rules, tips and common questions are on the Calcudoku page, and How to Solve Calcudoku Puzzles goes into strategy.
Other days of Calcudoku
- Calcudoku #839, Oct 19
- Calcudoku #838, Oct 18
- Calcudoku #837, Oct 17
- Calcudoku #835, Oct 15
- Calcudoku #834, Oct 14
- Calcudoku #833, Oct 13
- Today’s puzzle, #851
Every day of the last 60 is in the puzzle archive.