Hype Cross
Kakuro — the crossword you solve with numbers. Fill every white square with 1 to 9 so each across and down run adds up to its clue, with no digit repeated in a run. Pure logic, no luck.
Kakuro: how to play, rules & tips
Play Kakuro free online, the crossword you solve with numbers. Fill every white square with 1 to 9 so each run adds up to its clue, with no digit repeated in a run. No sign-up, no download.
How to play Kakuro
The grid has dark clue squares and white squares. A clue square shows a target sum for the run of white squares to its right (across) or below it (down).
Fill each white square with a digit from 1 to 9. The digits in a run must add up to the clue, and a digit cannot repeat inside the same run.
Tap a white square, then a number. Erase clears a square and Reset clears the board. Most squares sit in both an across run and a down run, so each answer has to work both ways.
Puzzles and difficulty
There are 8 Kakuro boards: 2 easy, 3 medium and 3 hard. They range from a small 4×4 warm-up to 7×7 grids, counting the clue squares.
Every board was checked to have exactly one solution. The free Hint fills in a correct square whenever you need it, and there is no timer.
Kakuro tips
- Memorize the unique sums. Two squares: 3 is 1+2, 4 is 1+3, 16 is 7+9, 17 is 8+9. Three squares: 6 is 1+2+3, 7 is 1+2+4, 23 is 6+8+9, 24 is 7+8+9.
- Start where a short run with a unique sum crosses another run. The shared square must fit both.
- A large sum in a short run forces big digits; a small sum forces small ones. Use that to rule out options in the crossing run.
- Once all but one square in a run is filled, the last one is just the clue minus the rest.
- If a digit cannot repeat in a run, two squares that must hold 7 and 9 also keep 7 and 9 out of the rest of that run.
Frequently asked questions
Is Kakuro 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.
Can I use 0 in Kakuro?
No. Only the digits 1 to 9 are used, and each digit appears at most once in a run.
Is Kakuro harder than sudoku?
It uses more arithmetic, but the logic is similar. Learning the unique sums makes it much easier.
What if I get stuck?
Press Hint for a free correct square. You can also Erase or Reset as often as you like.