Tutorial #35 For hard puzzles. Advanced rule of Exclusion.

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When you reach the very difficult puzzles you may be forced to put in all the possible numbers. Once they are entered correctly then watch for where you can use the rule of exclusion because it really helps you to elininate many small numbers. The more numbers you can eliminate the easier the puzzle becomes.
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Видео Tutorial #35 For hard puzzles. Advanced rule of Exclusion. канала Sudoku Guy