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Interactive versions of my most popular puzzles, and some unique ones too. Play on an iPad, Kindle Fire, or your computer and save some trees!
Tough Killer Sudoku, Volume 1. Each booklet contains a collection of eight different puzzles, 1-per-page, 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 ...
Tough Sudoku Puzzles, Volume 1. Each of my books contains a collection of eight sudoku puzzles, 1-per-page, with a page of hints and a page of answers in the back. These booklets are in PDF format and need the Adobe Acrobat Reader to view or print.
Thousands of free interactive sudoku and logic puzzles. Solve in your web-browser, or on an iPad, Kindle Fire or Android tablet.
Super-Tough Sudoku Puzzles, 4-per-page, Volume 1. Each of my books contains a collection of eight sudoku puzzles, 4-per-page, with a page of hints and a page of answers in the back. These booklets are in PDF format and need the Adobe Acrobat Reader to view or print. Want to save some trees?
Free online sudoku puzzles
Many published sudokus (including the Easy, Novice and Intermediate puzzles on this website), won't require any technique beyond the first two, but the more advanced techniques are useful against the harder puzzles (Challenging thru Insane).
