Sudoku Techniques and Tips
The Naked Quadruple Technique in Sudoku
The Naked Quadruple expands on the logic of Naked Triples but uses four cells and four digits within a unit (row, column, or block). If four cells in a unit collectively hold exactly four unique candidates, those digits must fill one cell each and are eliminated from other cells in the same unit.
The Full House Technique in Sudoku - Sudoku Star
Learn the core sudoku rules Full House and apply strategy in Sudoku Star! Boost your logic skills and enjoy every puzzle!
The Naked Single Technique in Sudoku - Sudoku Star
Learn the core sudoku rules Naked Single and apply strategy in Sudoku Star! Boost your logic skills and enjoy every puzzle!
The Hidden Singles Technique in Sudoku - Sudoku Star
Learn the core sudoku rules Hidden Singles and apply strategy in Sudoku Star! Boost your logic skills and enjoy every puzzle!
The Locked Pair Technique in Sudoku - Sudoku Star
Learn the core sudoku rules Locked Pair and apply strategy in Sudoku Star! Boost your logic skills and enjoy every puzzle!
The Locked Triple Technique in Sudoku
A Locked Triple occurs when three cells in the same house (row, column, or block) contain only three candidates between them. These candidates may be distributed across the three cells in any combination, but they do not appear elsewhere in that house. This allows for the elimination of these candidates from other cells in the same house.
The Locked Candidates Technique in Sudoku
Locked Candidates is a technique where a candidate number is confined to a specific row or column within a block, allowing eliminations in the corresponding row or column outside that block, or vice versa. This technique has two variations: Pointing and Claiming.
The Naked Pair Technique in Sudoku
A Naked Pair occurs when two cells in the same house (row, column, or block) contain only the same two candidates. Since these two candidates must occupy these two cells, they can be eliminated from all other cells in the same house.
The Hidden Pair Technique in Sudoku
A Hidden Pair occurs when two cells in the same house (row, column, or block) are the only two cells that can accommodate two specific candidates. Although these cells may have other candidates, the two specific candidates are hidden among them. Once identified, other candidates can be eliminated from these two cells.
The Naked Triple Technique in Sudoku
A Naked Triple occurs when three cells in the same house (row, column, or block) contain only three candidates between them. These candidates may be distributed across the three cells in any combination, but they do not appear elsewhere in that house. This allows for the elimination of these candidates from other cells in the same house.