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Use Advanced Techniques: Employ advanced techniques like X-Wing, Swordfish, and XY-Wing to eliminate possibilities and fill in the missing digits. valid sudoku leetcodesudoku medium difficulty Look for X-Wing pairs: Similar to the X-Wing strategy, this involves finding pairs of intersecting points in different X-shaped patterns that can only be filled with two numbers. Jellyfish: This technique is similar to the Swordfish, but it involves finding four rows or columns with two cells each that contain the same four numbers. how to win sudoku fast
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