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2019-Aug-17: Volumes 19 and 20 of Killer Sudoku are out. Enjoy!

6x6 Krypto Inky Puzzles, Volume 4

Each booklet contains a collection of eight different puzzles, with a page of answers in the back. The booklets are ordered by ascending difficulty -- the puzzles in book 100 are much harder than the puzzles in book 1. All these puzzles have a single unique solution.

These puzzles are in PDF format and can be printed from your browser or the desktop. If you like these puzzles, also check out my other puzzles.

Problems printing puzzles? Try these work-arounds.

Out of 6x6 puzzles? Here's 800 more!.