sudoku 数独 XY-Chains XY-Chains The Y-Wing Chains are infact part of a more encompassing strategy called XY-Chains. The commonality is the same pincer-like attack on candidates that both ends can see and that the chain is made of bi-value cells. With Y-Chains the hinge was expanded to ...
Mirrored from Sudopedia, the Free Sudoku Reference GuideXY-WingAn XY-Wing is a solving technique that uses a short chain of 3 cells. The cell in the center is called the pivot. The other 2 cells are the pincers. The chain uses only 3 digits, symbolically named X, Y and Z. Any ...
In solving this weeks very hard Sudoku, I got stuck, and was able to crack it by using an "XY Wing" technique, referred to me by my father-in-law Yoske; it can be found under http://www.sudokuessentials.com/Sudoku-XY-Wing.html. After using it, and finishing this Sudoku, I found...
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