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Kakuro #840

#840 · Oct 20MediumArchive: not ranked

How to play

Each black square holds a clue: the number above its diagonal is the sum of the white run to its right, the number below is the sum of the run beneath it.
Fill every white square with a digit from 1 to 9. The digits of a run must add up to its clue, and no digit may appear twice in the same run.
Select a square, then type a digit or tap the number pad. Notes add pencil marks; the helper lists the digit sets for the selected runs.
Easy grids are 6 × 6, medium 8 × 8 and hard 10 × 10. Every grid has one solution and can be solved by logic alone. Fastest time wins.

Kakuro #840 is the puzzle from Tuesday, October 20, 2026 (medium). Archive puzzles count toward your statistics, not your streak or the leaderboard.

Archive games count toward your statistics, not your streak or the leaderboards.

About Kakuro #840

Kakuro #840 was the puzzle for Tuesday, October 20, 2026, a medium one: an 8 × 8 cross sum grid. Everyone who played Kakuro that day got the same puzzle, and it stays here to play for 60 days.

New to Kakuro? The rules, tips and common questions are on the Kakuro page, and How to Solve Kakuro: Cross Sum Strategy goes into strategy.

Other days of Kakuro

Every day of the last 60 is in the puzzle archive.

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