12/23/2023 0 Comments Sudoku strategy hidden triples![]() ![]() ![]() Hidden Pairs are another example of a relatively simple concept that is quite hard to spot in a puzzle. Since this is the case, we are free to erase all the other pencil marks in the green cells (erase the pink ones). I bet you can already guess what this means…That's right! These two cells must be 6 & 9.Īnd for the moment, it does not matter which green cell is the 6 and which is the 9 - the point is that those cells can only be 6 or 9. If we look closely, we can see that the two green cells are the only two that contain 6 & 9: This time, however, the pair is not "Naked" - it is buried (or hidden) among other pencil marks.įor example: The picture below shows a block with many unsolved cells. Not all 3 cells must contain all 3 candidates, but these 3 cells should contain the 3 candidates between them and not more than 3 candidates in each cell. If the middle cell were 123 instead of 13, this strategy would not work. No marks required The dots in the cell in row 3, column 5, indicate that in that cell the numbers 4, 5, 6, and 8. ![]() It occurs when two pencil marks appear in exactly two cells within the same house (row, column, or block). If there are three cells in a house (row, column or box) that have the same 3 candidates, you can eliminate these 3 candidates from all the other cells in that house. You should always start a Sudoku by finding all the hidden singles. A Hidden Pair is basically just a "buried" Naked Pair. In the same way we have extended Naked Pairs to Naked Triples, we can extend Hidden Pairs to Hidden Triples. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |