Sum Sudoku Challenge
Play Killer Sudoku online free with our daily puzzle generator! Killer Sudoku (also known as Sum Sudoku or киллер судоку in Russian) is an exciting variation of the classic Sudoku puzzle. It combines elements of Sudoku and Kakuro to create a challenging and rewarding experience. Best of all, no login required to start playing!
Start by looking for cages with only one possible combination of numbers. For example, a 2-cell cage with a sum of 3 must contain 1 and 2. A 2-cell cage with a sum of 17 must contain 8 and 9.
Use the "Rule of 45". Each 3x3 block, row, and column must sum to 45. By comparing the sum of cages within a block to 45, you can often find the value of cells that stick out of the block.
Sum Sudoku emerged in Japan in the mid-1990s as a variation of standard Sudoku. By combining arithmetic with logic, it offers a deeper challenge than standard Sudoku. Play Sudoku Killer Daily to sharpen your mind with fresh puzzles every day!
Killer Sudoku adds "cages" with sum requirements to the standard Sudoku rules. You must satisfy both the row/column/block constraints and the cage sum constraints.
Sudoku killer combinations are the possible sets of unique numbers that can sum to a specific total within a cage. For example, a 2-cell cage with sum 17 can only be 8+9. Learning common combinations helps solve puzzles faster.
Expert Killer Sudoku requires advanced strategies and deep logical thinking. It combines complex cage combinations with minimal initial clues, making it perfect for experienced players seeking a real challenge.
No, numbers cannot repeat within a single cage, even if they are in different rows or columns.
Yes, Killer Sudoku Daily is completely free to play online with no registration required and no intrusive ads.
The rules are the same as standard Sudoku, with the addition of cages. Each cage has a sum that must be met by the numbers within it, and no numbers can repeat within a cage.
It can be, but it also provides more clues through the cage sums. Many players find it more engaging because of the arithmetic element.