74: Su Doku

Image Text

This one is from the Red Belt collection, of 'medium' difficulty

Description

First off, a little background: Su Doku (Japanese for "Single number") is a kind of puzzle, in which the player must place numbers (usually 1-9) in a (9 by 9) matrix playfield in such a way that no number appears twice on a horizontal and vertical row, and in a region of nine numbers in said matrix. Depending on the number of pre-filled numbers, the difficulty increases as the possibilities widen. The image text refers to the “Red Belt”-collection, which is a series of extremely difficult puzzles.

Now to the joke: when you play binary Su Doku, you only end up with two numbers (0 and 1), thus creating a maximum playfield of 2 by 2. Even the “Red Belt” series therefore will be easy to solve, as you can see in the comic.