Shared Subgroup rule
When the Only Choice and Only Square rules reveal no new squares, the Shared Subgroup rule often comes to the rescue.
Copyright © 2005-2009 Sudoku Dragon
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Shared Subgroup ruleWhen the Only Choice and Only Square rules reveal no new squares, the Shared Subgroup rule often comes to the rescue. Copyright © 2005-2009 Sudoku Dragon |
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