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 $7.87 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 $2.99 From the creator of Sudoku Genius come 144 devilish puzzles with advanced strategies…. 

Sudoku for Lunch: 250 Original Sudoku Puzzles $13.99 In Sudoku for Lunch, Ian Riensche has composed 200 original 9×9 sudoku puzzles, and 50 original 6×6 puzzles. The puzzles are arranged by difficulty and wittily named according to time blocks that they could appropriately fill, such as Coffee Break, Lunch Break, or Afternoon Off. Never played Sudoku before? No problem. Ian Riensche includes an easy howto, explaining the logic to solving these enco… 