Sudoku Tutorial # 88 The many tricks for Matching Pairs.

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Tricks and rules for matching pairs.
(Definition of a matching pair) 2 cells in a row, column or block, which have the same small numbers.
1 Matching pair + 1 empty cell. Count from 1 to 9 to find that missing number. When counting, include the numbers in the matching pair.
2 Matching pair + 2 empty cells = another matching pair.
3 If there are 2 empty cells in a row, column or block and one of the cells has 2 little numbers, then the other empty cell must have those same little numbers.
4 When you solve one of the numbers in a matching pair, then the other number is also solved.
5 You can have up to 4 matching cells in a row, column or block.
6 When you find a matching pair in a row, column or block, any other same numbers in the row, column or block can be removed.
7 Hidden matching pairs are often found on computer apps as the app does not recognize them. Then it is up to you to locate them and remove other small numbers that are not part of the matching pair
8 NOTE A triplet (3X3) and a quadruplet (4X4 ) + 2 empty cells in a row, column, or block = another matching pair. This was not covered in the tutorial.
9 NOTE Tutorial # 89 "remote matching pairs." Another trick to know about matching pairs.
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Видео Sudoku Tutorial # 88 The many tricks for Matching Pairs. канала Sudoku Guy