Solving sudokus - Contents

Elementary

• Intro
• The easiest methods
• Baby steps
• Forced digits
• Forced cells
• Forced pairs
• Two pairs
• Double pairs
• An easy example
• ... continued

Intermediate

• Matching
• A more difficult example
• Subsets
• Conjugate pairs and Empty rectangles
• Alternating digits
• Forcing chains
• Alternating pairs
• Colouring
• Uniqueness
• Backtrack

Advanced

• Finned fish
• Nishio
• Generalized forcing chain
• More general forcing chains
• Sets as nodes in forcing chains
• Advanced colouring
• Broken Wing
• Packing
• Digit patterns and jigsaw puzzles
• Digit patterns (2)

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