X-Chain , How to solve sudoku puzzles - Solving sudoku strategy

How to Solve Sudoku - Solving Sudoku Techniques and Tips

Example Puzzles and Solutions

Concurrent Sudoku Solver: Part 1 - Single Candidate Technique + Domain Modelling, by Farooq Qaiser

Ways to solve Sudoku Puzzles

Example Puzzles and Solutions

Sudoku-Help-Plus Multi Value Chains

Solution cost of a Sudoku puzzle.

Sudoku Solving Techniques

Mastering Sudoku @