Killer Sudoku Jigsaw - 200 Hard to Master Puzzles 9x9 (Volume 7)

In Killer Sudoku, sub-regions have specified sums, and no number can be repeated within a region. This variant also called "Sums Sudoku", "Sums Number Place", "Samunamupure", "Kikagaku Nampure". Killer Sudoku is a puzzle that combines elements of Sudoku and Kakuro. Regular 9x9 Killer Sudoku that row and column rules apply, but instead of a 3×3 grid they are nine Jigsaw shapes.
Despite the name, the simpler killer sudokus can be easier to solve than regular sudokus, depending on the solver's ...