Master of Puzzles - Jigsaw Killer Sudoku 200 Hard Puzzles vol.3 - James Lee - Bog

Killer Sudoku is a mix of Sudoku and Kakuro.The objective is to fill the grid with numbers from 1 to 9 in a way that the following conditions are met: Each row, column, and nonet contains each number exactly once. The sum of all numbers in a cage must match the small number printed in its corner. No number appears more than once in a cage.Regular 9x9 Killer Sudoku that row and column rules apply, but instead of a 3×3 grid they are nine Jigsaw shapes.