KenKen (Calcudoku) Game
Fill the grid with numbers so that each row and column contains digits 1 to 4 without repetition. Respect the cage targets and operations shown in the top-left of each cage.
Puzzle
Time: 0:00
3+
7+
12×
1-
3+
3+
1-
7+
How to Play
- Each row and column must contain numbers 1 to 4 without repetition.
- Each cage has a target and an operation; the numbers in that cage must produce the target.
- Single-cell cages show a fixed value target.
- Use Notes to pencil in candidates before committing a value.
Strategy tips
- Start with singleton cages (=): fill these fixed values first.
- Scan rows/columns for near-complete lines to eliminate duplicates quickly.
- For +/- cages, remember order can matter; check both large−small and small−large possibilities.
- For ×/÷ cages, enumerate factor pairs that fit the grid size and rule out duplicates in the row/column.
- Use Notes to track candidates and turn on error highlighting to spot conflicts early.
Common patterns
- Sum cages close to min/max: e.g., in 4×4, 7(+) over two cells is usually 3+4.
- Product cages with primes: limited pairs make deduction faster (e.g., 6 = 2×3).
- Row/column uniqueness: if a number appears as the only candidate in a line, place it.