About Calcudoku #842
Calcudoku #842 was the puzzle for Thursday, October 22, 2026, a medium one: a 5 × 5 grid in 10 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 #845, Oct 25
- Calcudoku #844, Oct 24
- Calcudoku #843, Oct 23
- Calcudoku #841, Oct 21
- Calcudoku #840, Oct 20
- Calcudoku #839, Oct 19
- Today’s puzzle, #851
Every day of the last 60 is in the puzzle archive.