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Sudoku How To Technique: Box Line

Almost the same logic as Pointing Pair and Triples however applying to a BOX CONTAINER. Take a look at BOX 7, and ROW R7. ROW R7 has two HINTS of {7} that both share the same BOX CONTAINER, and nowhere else within that row. Because of that, we know that the cell value of {7} must reside on R7 and we can safely remove any other HINT values of {7} from BOX 7.

The hints HAVE TO SHARE the same BOX or the logic is invalid.

This solving method has been categorized as Hard Sudoku. Try this and other Hard Sudoku solving methods.
Try this Box Line Sudoku puzzle.

Puzzle Number: 1005466
Method: BOX-LINE REDUCTION {7} - In Block Type: BOX
Found Cell and Hints: s1r7c2 7; s1r7c3 7;
Removing Hints: s1r8c1 7; s1r8c3 7; s1r9c1 7; s1r9c2 7; s1r9c3 7;

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