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Sudoku Almost Locked Sets Strategy explained
Sudoku: February 2007
HoDoKu: Solving Techniques - Naked Subsets (Naked Pair, Naked Triple, Naked Quadruple, Locked Pair, Locked Triple)
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JSudoku - XY-Chains, Loops & Almost Locked Sets
Sudoku Assistant -- Solving Techniques
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Locked Candidates Type II (Claiming) / Sudoku Tutorial #7 - YouTube
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HoDoKu: Solving Techniques - Naked Subsets (Naked Pair, Naked Triple, Naked Quadruple, Locked Pair, Locked Triple)
BrainBashers - Sudoku - Locked Sets
HoDoKu: Solving Techniques - Naked Subsets (Naked Pair, Naked Triple, Naked Quadruple, Locked Pair, Locked Triple)
HoDoKu: Solving Techniques - Naked Subsets (Naked Pair, Naked Triple, Naked Quadruple, Locked Pair, Locked Triple)
SudoCue - Sudoku Solving Guide
SudokuWiki.org - Hidden Candidates
Locked Candidates - Sudopedia Mirror
