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# Sudoku: Y-Wing Strategy and Techniques

The Y-Wing Sudoku strategy is an advanced solving technique in Sudoku puzzles that involves three cells and three numbers forming a specific pattern. It can lead to deductions that help solve other squares in the puzzle. Here’s a step-by-step guide on how to use the Y-Wing strategy:

1. Analyze the Puzzle: Examine the grid and identify a set of three cells that have candidate numbers.
2. Identify the Y-Wing Pattern: Look for a pattern where two of the cells are linked by sharing the same candidate number, while the third cell is connected to both but has a different candidate number. The three cells should form a “Y” shape.
3. Examine Implications: Focus on the candidate number shared by the two linked cells and consider its implications within the puzzle. Look at how its presence or absence in other cells affects their candidates.
4. Make Deductions: Depending on whether or not the candidate number appears in the connected cell, you can make deductions about other squares in the puzzle. This is done by eliminating certain candidate numbers based on constraints resulting from this relationship.
5. Update Puzzle: After making deductions based on the Y-Wing Sudoku pattern, reassess the puzzle and repeat the process if necessary, looking for additional Y-Wing opportunities.

Mastering this strategy requires practice and familiarity with identifying Sudoku Y-Wing patterns and their implications. As you gain experience, you’ll become more proficient at using this technique to make deductions that bring you closer to solving even challenging Sudoku puzzles.

## Sudoku Solver

If you get really stuck then we have an online Sudoku Solver, and a Sudoku Mini Solver to help you solve the most challenging Sudoku puzzles.