Sudoku meets arithmetic. Fill the grid so no number repeats in any row or column, and the numbers in each outlined cage combine to its target using the operation shown.
Runs entirely in your browser. Nothing is uploaded to any server.
A new grid is generated every time, so you never run out.
Each puzzle is checked by a solver to have exactly one answer, no guessing required.
Pencil notes, mistake checking and single-cell hints help you learn the techniques.
A KenKen grid of size N uses the digits 1 to N, with no repeats in any row or column, just like a Latin square. Heavy outlines mark cages. Each cage shows a target and an operation: the numbers in the cage must add, multiply, subtract or divide to make the target. For subtraction and division cages, which always have two cells, take the larger number minus or divided by the smaller. A single-cell cage simply gives you that cell's value.
Numbers may repeat inside a cage as long as they are in different rows and columns. Start with single cells, then cages with very few possible combinations, such as a 2-cell 3x cage that must be 1 and 3.
In a 4x4 a 2÷ cage can only be 1-2 or 2-4.
Big multiplication targets quickly limit which digits fit.
Every row adds to N(N+1)/2, which can unlock the last cell.
KenKen is a trademark of Nextoy. These are original puzzles in the same calcudoku style, generated in your browser.
Yes, if the repeated cells are in different rows and columns.
Press Notes (or N on a keyboard) and tap numbers to pencil them into the selected cell. Placing a number removes it from notes in the same row and column.
No. Solves that used hints or reveal are not recorded as best times.
Yes. Use the arrow keys to move, number keys to enter, Backspace to erase and N to toggle notes.
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