Sudoku Xwing
Explain the advanced SuDoKu puzzlesolving techniques?
Explain a method such as Xwing and Swordfish so that even a Yahoo like me can understand.
The only technique is in your own mind …explore it…It really works…Try it…
Sudoku Solving Tip – X Wing Technique

Djape Does Sudoku: 300 Puzzles For Advanced Solvers $7.99 This is the first book by Djape with classic Sudoku puzzles. There are 5 difficulty levels with 60 puzzles each. First 240 puzzles can be solved by using standard Sudoku solving methods: naked or hidden singles, pairs, triplets and quads, and row/column and box interactions. The final level, the so called INSANE, contains puzzles which require you to use either the XWing or Swordfish techniques. … 

Sudoku Master Class $1.03 … 

How to Solve Sudoku & Kakuro $12.11 Don’t know where to begin with a Sudoku puzzle? Let academic Catherine Shaw guide you through the intricacies of the international puzzle craze, unlocking the logic behind ‘magic squares’ and helping you on the way to success. Far from being your average puzzle book, Shaw not only aims at initiating readers into the world of Sudoku and its cousin Kakuro, she also charts the history of th… 