Kakuro - Free Online | FunToolX
Use Kakuro online for free, no download required. FunToolX offers hundreds of fun online tools.
About this tool
Kakuro is a free online game. Fill 1-9 so each run adds up to its clue. Play instantly — no install, no waiting. It runs entirely in your browser — no download or sign-up needed.
Similar to the combination of Sudoku and crossword. The chessboard consists of black and white grids. The black grids have hints (horizontal and vertical), and the white grids need to be filled in 1-9. The sum of each horizontal continuous white grid is equal to the number of horizontal hints in the black grid on the left, and the same applies vertically. Numbers in the same group of consecutive white squares cannot be repeated.
Problem solving ideas: Find positions with strong constraints first-for example, two squares with a sum of 3 can only be 1+2, and two squares with a sum of 17 can only be 8+9. Reasoning step by step through cross-constraints.
The difficulty depends on the size of the board and the number of hints. Use CSS Grid to draw a chessboard, enter with number keys or click on the number panel. Error detection highlights conflicting groups.
In the Kakuro game, fill in 1-9 in the grid so that the sum of each row and column is equal to the number of hints on the left/top, and the numbers are not repeated within the same group.