Ready to boggle your mind? This is the diabolical difficulty series volume 3 geared towards those who crave the ultimate challenge. Deploy advanced techniques like X-Wing, Naked/Hidden Subsets, Swordfish, Forcing Chains, etc. Consider yourself a Sudoku master if you can solve all the puzzles in this book For easier puzzles, check out the easy, medium, and advanced series from the same author. The puzzle on the cover is representative of the difficulty level of puzzles in this book. You can try to solve it to gauge which difficulty series is right for you. Don't stop after you complete this book - get volume 4 for more puzzles
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.