Killer Sudoku Samurai: 65 puzzles

Abandon standard placement. Engineered strictly for elite solvers requiring a massive escalation in deductive endurance, this 65-grid volume introduces the most complex hybridization of multi-grid architecture and arithmetic deduction. These puzzles are meticulously constructed by the expert responsible for the Samurai Sudoku features published every Sunday in the Washington Post since 2006, ensuring a professio...