Killer Sudoku Strategy Tips

The rules and strategy tips on successfully solving Killer Sudoku puzzles. The aim of the puzzle is to place the numbers from 1 - 9 once in each region of the puzzle, and so that the cage sums match those given at the top left of each caged region. Rules include a combination of kakuro and sudoku solving

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Killer sudoku - been staring at this one for ages and can't see a way forward. Any technique tips please? : r/sudoku

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