Detailed solutions of Sudoku Edigo

The 270 puzzles in Volume 2 by Edigo Editions, levels 3 to 6, are excellent games for middle solvers to great experts. But puzzles are designed and solved by computers. Ranking of puzzles is not perfect for humain solvers. This booklet has six chapters. Chapter 1 finishes puzzles with single putting rule. Chapter 2 finishes puzzles with single posting rule. Alignment-rule is necessary in chapter 3. Multiple putting rule and M-rule are necessary in chapter 4. Attached symbols chains are neccessary in chapter 5. Mixed chain is necessary in chapter 6. In no chapter, the complete board of candidates is used. As the booklet is written for solvers who had the Sudoku Edigo book, no word or no puzzle of this book is reproduced here.