Hype Kakurasu

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Kakurasu is a pure logic puzzle: no luck, no timer. Each shaded square is worth its column number toward its row's target, and its row number toward its column's target. Shade the right squares so every row and column matches its clue.

Puzzle1 / 10

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Difficultyeasy

Kakurasu: how to play, rules & tips

Play Kakurasu free online: shade squares so every row and column adds up to its target. It is a pure logic puzzle with no luck and no timer, and every board has exactly one answer.

How to play Kakurasu

The rows and columns are numbered 1, 2, 3 and so on, starting from the top left. The clue at the right end of each row is a target sum, and so is the clue under each column.

Tap a square to shade it, and tap again to unshade it. A shaded square adds its column number to its row's total, and its row number to its column's total. For example, shading the square in row 2, column 4 adds 4 to row 2 and 2 to column 4.

The board is solved when every row and every column hits its target exactly. If a row or column goes over its clue, its shaded squares are highlighted so you can spot the mistake.

Kakurasu puzzles and sizes

There are 10 puzzles in three difficulty levels: four easy 5x5 boards, three medium 6x6 boards and three hard 7x7 boards. Pick any of them from the puzzle list, or use Next puzzle after a win.

Each board was checked by a solver to have exactly one solution, so you never need to guess. The free Hint always shows a correct move, and Reset clears the board. Your best score on each puzzle is banked, so starting over never costs you anything.

Kakurasu tips

Small clues have few options. A clue of 1 or 2 can only come from one square: column 1 or column 2.
A clue of 3 is either square 3 alone or squares 1 and 2 together. Write down the short list of ways to make each small clue.
For big clues, think about what is left out. On a 5x5 board a full row is worth 15, so a clue of 13 means only square 2 stays empty.
Every shaded square counts twice, once in its row and once in its column. Check each choice against the crossing clue before you commit.
When a row's options all share the same square, shade it. When none of them use a square, you know it stays empty.

Frequently asked questions

Is Kakurasu free?

Yes. HypeGameRoom is free: no sign-up, no download and nothing to buy to play. Arcade games reward Neons, a play-only currency that can never be cashed out.

How do Kakurasu clues work?

Each row clue is the sum of the column numbers of the shaded squares in that row. Each column clue is the sum of the row numbers of the shaded squares in that column.

Does every Kakurasu puzzle have one solution?

Yes. Every board here was checked by a solver to have exactly one solution, so it can always be finished with logic alone.

Is there a hint?

Yes. The Hint button is free and always correct. It shows one square that should be shaded or left empty.