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# Sudoku: Swordfish Strategy and Techniques

The Swordfish strategy is an advanced technique in Sudoku puzzle solving that can help you make deductions and narrow down possibilities. It is similar to the X-Wing strategy but expands the concept to three rows or three columns. By recognizing patterns where a number can only occur in the same three positions across these rows or columns, you can eliminate that number as a possibility in other squares within those rows or columns.

To use the Swordfish strategy, follow these steps:

1. Analyze the puzzle and choose a specific number to focus on.
2. Look for rows that contain the chosen number in two or more squares.
3. Look for columns that contain the chosen number in two or more squares.
4. Identify three rows where the chosen number appears in the same three positions and align with three columns where the number also appears in the same three positions. This forms a Swordfish pattern.
5. Once you identify this pattern, eliminate the chosen number as a possibility from other squares within those rows or columns because it must appear in those specific positions of the Swordfish pattern.
6. Update your puzzle and repeat these steps for other numbers, looking for additional Swordfish patterns.

Remember to practice and develop your ability to recognize these patterns efficiently. With experience, you’ll become faster at identifying Swordfish opportunities and making deductions using this strategy.

Mastering the Swordfish strategy requires practice and a keen eye for patterns. With experience, you’ll develop the ability to quickly identify Swordfish opportunities and make efficient deductions, which can significantly speed up the puzzle-solving process.

## 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.