Diagonal Sudoku Samurai X: 100 puzzles

Abandon standard single-grid isolation and linear constraints. Engineered strictly for elite solvers requiring a massive escalation in spatial reasoning, this 100-grid compendium introduces the Diagonal Samurai X framework. These puzzles are meticulously constructed by the expert responsible for the Samurai Sudoku features published every Sunday in the Washington Post since 2006, providing a professional-grade mental workout d...