XY-Wing strategy is an advanced technique for eliminating candidates. Let’s review it with an example. Let’s say, there are 3 different cells with exactly 2 candidates (notes) each that are related to each other. The cell in the center is called the pivot. The two others are called ...
The pattern can be applied for intersection of 3 groups with 3 other groups (Swordfish) or intersection of 4 groups with other 4 groups (Jellyfish). For additional detail on identifying and solving those techniques please checkhttp://www.sudokuwiki.org/X_Wing_Strategyorhttp://hodoku.sourceforg...
Similar to the XYZ-Wing, the pivot has the candidates WXYZ. In all possible options for the pivot cell, Z will be eliminated from the starred cells. Extended form of the WXYZ-Wing The idea from the extended form of the WXYZ-Wing comes from the following observation: If the WZ is W,...
X Wing Swordfish XY Wing (aka Y Wing) >> use checkboxes to track your progress. Sudoku Tips and Tricks While it relies heavily on logic and reasoning, there are certain tips and tricks that can make solving these puzzles more manageable and enjoyable. Start Simple If you're new to Sudoku...
Hook or X-Y Wing Sudoku rule When I first saw the term X-Y Wing I thought someone had just mistyped X-Wing or that it was yet another variant of it. It turned out that the Sudoku X-Y Wing is another advanced strategy separate from pairs but once again using the ‘either-or’ ...
Then for any digit X that is a common candidate for A and B, we can eliminate X from any cell that sees all cells belonging to either A or B and having X as a candidate. Observe that this technique is very similar to XY-Wing, and hence its name. The similarity can be illustrated...
XWing, Swordfish, Jellyfish, XYWing, XYZWing Button: Hint Request a hint to find the next cell to solve. A hint will either identify a cell which can be solved or a cell or cells where candidates can be removed. If candidates are entered on the grid, those candidates will be used to...
← X-Cycles Strategy 3D Medusa Strategy → XY-Chain StrategyThe XY-Chain strategy allows you to eliminate candidates in a manner similar to Y-Wing. How to Use XY-Chain To use XY-Chain, look for two bi-value cells (we'll call them "pincers") that can't see each other but that ...
Watch the video and learn how to apply Y-wing strategy in Sudoku game! Train your brain and have fun!
Y-Wing is a strategy that allows you to eliminate candidates. When to Use Y-Wing Y-Wing starts with a square that contains exactly two candidates. This square is sometimes called a pivot or hinge. The red square in the above image is the pivot. You can use Y-Wing if each of the...