Advanced Sudoku
Welcome to Advanced Sudoku, where puzzles begin to challenge your analytical abilities with more sophisticated solving techniques. This difficulty level is designed for experienced players who enjoy applying multiple solving strategies in combination.
Techniques You'll Need
- Hidden Triplets
When three numbers appear only in the same three cells of a unit, all other candidates can be removed from those cells
- Claiming Pairs/Triples
When a number in a row or column can only appear in cells within one block, that number can be eliminated from other cells in that block
- Naked Triplets
When three cells in a unit contain only the same three candidates (some may have fewer), those candidates can be eliminated from other cells
- X-Wing
When a candidate appears in exactly the same two positions in two different rows, it can be eliminated from those columns in other rows
- Y-Wing
A three-cell pattern where eliminations can be made based on a common candidate in two cells connected to a pivot cell
- Swordfish
An extension of X-Wing involving three rows and three columns, allowing for more complex eliminations
Strategic Challenge
These puzzles will help you develop deeper insight into Sudoku solving patterns and prepare you for even more challenging difficulties. You'll need to combine multiple techniques and think several steps ahead to succeed!