You complete Kakuro when every white cell is filled and every across and down run contains unique digits summing exactly to its clue. The full Kakuro position determines the outcome; visual shortcuts never replace the documented Kakuro terminal rule.
Your unfinished game is saved only in this browser.
You complete Kakuro when every white cell is filled and every across and down run contains unique digits summing exactly to its clue. The full Kakuro position determines the outcome; visual shortcuts never replace the documented Kakuro terminal rule.
Complete guide
Kakuro uses the independently implemented Nikoli Kakuro rules v1 profile (R366). Kakuro is a complete deterministic browser game built around intersecting horizontal and vertical digit runs whose nonrepeating values from one through nine must equal their directional clue sums.
Kakuro begins with a blocked crossword-like grid where black clue cells give separate across and down sums for contiguous white runs. The Kakuro deal identity and Nikoli Kakuro rules v1 are stored together. Restarting Kakuro reproduces this opening exactly.
During Kakuro, you enter or clear digits one through nine in white cells while the engine rejects repeated digits or sums impossible for either intersecting run. The Kakuro engine rejects profile violations, unavailable material, and every action attempted after Kakuro reaches a terminal result.
You complete Kakuro when every white cell is filled and every across and down run contains unique digits summing exactly to its clue. The full Kakuro position determines the outcome; visual shortcuts never replace the documented Kakuro terminal rule. In the Kakuro endgame, intersect the final two run candidates and verify both uniqueness and exact sums before committing their shared cell. Check every remaining Kakuro action before committing because its terminal rule is enforced immediately.
A reliable Kakuro plan is to list valid digit combinations for short or extreme-sum runs and use crossings to fix their order rather than guessing permutations. A Kakuro hint is legal and deterministic. The next Kakuro hint exposes one bounded action; it never claims a forced Kakuro win. A costly Kakuro mistake is to reuse a digit inside one run because the total remains correct; Kakuro forbids repetition independently in each contiguous run. Undo supports studying that Kakuro decision, while restart preserves the original seeded Kakuro opening.
Kakuro uses intersecting horizontal and vertical digit runs whose nonrepeating values from one through nine must equal their directional clue sums. That rule belongs to the Kakuro engine and storage identity rather than a cosmetic preset.
Digit uniqueness is scoped to one contiguous clue run; the same digit may appear elsewhere in its row or column after a block.
Kakuro records its game ID, rules version, and seeded deal identity. Those Kakuro values recreate the same opening without a server request.