Play Lovatts Free Daily Online Killer Sudoku
Killer Sudoku is the Sudoku you love, with maths! It follows the logic rules of Sudoku but needs your powers of arithmetic too. Killer Sudoku is just like a traditional Sudoku in that every row, column, and 3×3 block must contain the numbers 1-9. The twist? There are no given numbers to kick-start the puzzle. Instead, the digits in cells linked by a shaded line (a set) add up to the total displayed on the grid. Use these given totals to find the right digits for each set. No digital may appear twice in a set. It’s a perfect combination for logic lovers.
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Need help getting started? Jump to our helpful ‘how-to’ guide below ↴
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About Killer Sudoku
The Killer Sudoku puzzle is like a traditional Sudoku in that every row, column and 3×3 block must contain the numerals 1-9. The difference is that you are not given numbers to start you off. The numbers that occur in the squares linked by a shaded line (a set) add up to the total given in the top left-hand corner of each set. No number is repeated in any of these sets. Use these totals to find the right numbers to solve the puzzle.
5 Killer Sudoku Solving Tips & Strategies
Discover the secrets to mastering Killer Sudoku with these 5 solving tips! Whether you’re new to Killer Sudoku or a seasoned solver, these easy-to-follow strategies will help you get started and solve these clever puzzles with confidence.
1. Start with Single Digits:
Fill in single digits where you can see a clear placement.
2. Focus on Two-Digit Sets:
Next, identify two-digit sets and figure out possible combinations. For example, if the total is 3, it can only be 1 & 2. If it’s 17, it must be 9 & 8.
3. Expand to Three and Four-Digit Sets:
Gradually move on to larger sets and continue noting possible numbers.
4. Use the 45 Rule:
It’s important to know that the numbers in each row, column, and 3×3 block add up to 45. As a rule of thumb, if the shaded sets filling a 3 x 3 block have just one digit protruding into another block, that number must be the total of those sets minus 45.
5. Enforce Basic Sudoku Rules:
Always adhere to the fundamental Sudoku rules: no repeating numerals 1-9 in any row, column, 3×3 block, or set of numbers. Following these rules will guide you to unravel the Killer Sudoku!
