The Big Book of Logic Puzzles - Killer Sudoku 400 Hard (Volume 54) - Paperback

by Mykola Krylov (Author)

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".