This is probably the most challenging puzzle game the puzzle world has ever seen. It is sudoku for people who can count.
The game has the same look-and feel of sudoku. No No numbers are given as hints. You have to find all the 81 numbers. You are given few clues as sum of cells grouped by dotted lines. The freeware version has 30 puzzles in 4 difficulty levels. We will add more puzzles sooner.
Killer Sudoku or Sum Sudoku
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