Killer sudoku (also killer su doku, sumdoku, sum doku, addoku, or samunamupure) is a puzzle that combines elements of sudoku and kakuro. Despite the name, the simpler killer sudokus can be easier to solve than regular sudokus, depending on the solver's skill at mental arithmetic; the hardest ones, however, can take hours to crack.
A typical problem is shown on the right, using colors to define the groups of cells. More often, puzzles are printed in black and white, with thin dotted lines used to outline the "cages" (see below for terminology).
Read more about Killer Sudoku: History, Terminology, Rules, Duplicate Cell Ambiguity, Cage Total Tables
Famous quotes containing the word killer:
“When a man’s partner’s killed, he’s supposed to do something about it. It doesn’t make any difference what you thought of him, he was your partner and you’re supposed to do something about it. As it happens, we’re in the detective business; well, when one of your organization gets killed, it’s, it’s bad business to let the killer get away with it. Bad all around. Bad for every detective everywhere.”
—John Huston (1906–1987)