100 Sudoku Puzzles with Explained Solutions

This booklet has five chapters. Chapter A (single technique) is written for beginner and middle solvers; one page of theory and 33 examples. Chapter B (multiple technique) is written for confirmed solvers; one page of theory and 17 examples. Chapter C (covering technique ) is written for experts; one page of theory and 21 examples. Chapter D (perfect polygons) is written for great experts; two pages of theory and 8 examples. Chapter E (chains technique) is written for very great experts; three pages of theory and 21 examples. These five techniques finish almost all puzzles proposed in the world.