World's Hardest Killer Sudoku: Is Your IQ Good Enough to Solve These INSANE Puzzles?

By djape

World's Hardest Killer Sudoku - 100 Puzzles at IQ and INSANE Level Only

This book delivers exactly what the title promises: 100 Killer Sudoku puzzles of the absolute hardest difficulty. No easy puzzles, no medium fillers - just IQ-level and INSANE-level challenges, one per page.

Killer Sudoku adds cage totals to standard Sudoku rules. At this level, you will need:

Rule of 45 - the fundamental Killer techniqueInnies and Outies - deducing cell values from cage mathCage splitting and merging - advanced logical stepsNaked and hidden sets - from classical Sudoku applied to KillerWhat's Inside100 Killer Sudoku puzzles - IQ and INSANE levels onlyOne puzzle per page - 6 x 9 inch formatThick paper, bold font, all solutions includedThe World's Hardest Killer Sudoku. Volume One.

By DJAPE - PhD in Computer Science, Washington Post puzzle contributor since 2006, renowned for publishing the world's most challenging Killer Sudoku collections. A perfect gift for the Killer Sudoku solver who thinks they have seen it all - they haven't.

• Format: Paperback
• Language: English
• ISBN: 1790247535
• ISBN13: 9781790247530
• Release Date: November 2018
• Publisher: Independently Published
• Length: 114 Pages
• Weight: 0.40 lbs.
• Dimensions: 0.2" x 6.0" x 9.0"