Killer Sudoku Pro puzzles on puzzlemix appear at a wide range of sizes and difficulties but usually they are 6圆, 8x8 or 9x9. In other words, guessing is never required. And although it might appear that these puzzles can involve a lot of mathematics, it's rare that you need to do any tricky calculations when solving - they solve mostly via logical deductions similar to regular Sudoku.Įvery Killer Sudoku Pro puzzle only ever has one possible solution, and it can always be reached via reasonable logical deduction. For example the 4-square "0-" cage in this puzzle can only be solved by 6,3,2,1 - nothing else is possible. This is the only possible solution to this cage, although the numbers could have been entered in other order (6 and then 1).Īlways remember that because you cannot repeat a number within a cage there are often more possibilities than it might appear. This is solved with the values 1 and 6, since 6÷1=6. In this 6圆 puzzle the top-left cage has a clue of "6÷". So the solution to "8+" can never be 1+1+6, for example. For subtraction and division you should start with the largest value in the cage and then subtract/divide by the rest, so for example "3-" could be solved with 2,6,1 since 6-2-1 = 3.Īnd what's more, numbers cannot repeat in a cage. For example the solution to a "5+" cage requires a set of numbers that add up to 4, such as 1 and 4 or 2 and 3. You must also place numbers so that each dashed-line cage so that the given total results when the stated operation is applied between all of the numbers in that cage. Like Sudoku, you must place each of the numbers 1 to 9 (or 1 to the size of the puzzle) into each of the rows, columns and bold-lined 3x3 (or other size) boxes that make up the grid.
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