Sudoku Rules
Pointing Pairs
A strategy where a candidate number appears only in one row or column within a 3×3 box, allowing that number to be removed from the same row or column outside the box.
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Pointing Triples
Similar to pointing pairs, this technique occurs when three candidate positions in a box align in the same row or column, enabling elimination elsewhere in that line.
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X-Wing
An advanced Sudoku pattern where a candidate appears in exactly two positions in two different rows or columns, forming a rectangle that allows eliminations.
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Y-Wing
A three-cell pattern involving a pivot cell and two wing cells that share candidates, enabling elimination of a specific candidate elsewhere in the grid.
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Swordfish
An advanced pattern similar to X-Wing but involving three rows and three columns, allowing elimination of candidates across the grid.
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