Puzzle

Solving a Sudoku puzzle depends on two simple principles, that, rigorously applied, will solve any Sudoku:

• necessity: an entry has to necessarily be there to complete the series
• impossibility: an entry cannot possibly be there as it already exists in the series

Are you lost or incomplete?
Do you feel like a puzzle, you can't find your missing piece?
Tell me how do you feel?
-- Talk, Coldplay