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HoDoKu: Solving Techniques - Chains and Loops
Chain Sudoku - Medium - Sudoku-Puzzles.net
SudokuWiki.org - Digit Forcing Chains
Sudoku: Advanced-Single Chains
SudokuWiki.org - Single's Chains
X-Chain , How to solve sudoku puzzles - Solving sudoku strategy
Techniques: Forcing Chains - Sudoku Of The Day
SudokuWiki.org - Unit Forcing Chains
How to make this a chain? : r/sudoku
Nice Loops in Sudoku
HoDoKu: Solving Techniques - Chains and Loops
HoDoKu: Solving Techniques - Chains and Loops
SudokuWiki.org - Single's Chains
Chain that completely cracks the puzzle straight from single digit eliminations using an interesting strong link between 4 in r2c5 and 8 in r3c4, eliminating 4 in r2c4 : r/sudoku
Duncan's SuDoku Solver
Sudoku Expert - Following Single Chains - YouTube
Sudoku Simple Coloring Strategy explained
What am I doing wrong? The solution says that 8 in box 1 should be in C3, but that doesn't make sense with how I've done the Single's Chains method. : r/sudoku