In Mystery Killer Sudoku Pro you have all the challenge of Killer Sudoku Pro but with the mystery of not knowing what operation applies to each cage!
Basic Killer Sudoku adds to regular Sudoku with the addition of cages that must sum to a given value. Killer Pro adds subtraction, multiplication and division into the mix. And finally Mystery Killer Sudoku hides all the +, -, × and ÷ signs and makes you work out for yourself which one applies!
A key difference between Killer Sudoku puzzles and Calcudoku/Ken Ken™ puzzles is that you cannot repeat a digit in a cage, so if you have a cage summing to 6 then the solution cannot ever be 1+1+4, for example.
So in these puzzles you have all the regular Sudoku rules - placing each of the numbers 1 to 9 into the rows, columns and bold-lined boxes - but also the dashed line cage logic. For subtraction and division you should start with the largest value in the cage and then subtract/divide by the rest.
Despite appearances, there is only ever one possible solution and it can always be reached by sensible logical deduction!
