Sudoku. Tutorial #23 Hidden Matching pairs and other techniques.

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Whe you reached the difficult puzzles you may find it necessary to add many more small possible numbers for each cell. Some computer prgrams put all these in for you. It saves time but one of the skills is putting in the correct possible numbers. Spotting hidden pairs within a puzzle can appear once you know how to eliminate other numbers in a particular cell or cells. This sceanario shows this feature.

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Видео Sudoku. Tutorial #23 Hidden Matching pairs and other techniques. канала Sudoku Guy