Targeted Logic Training
Technique Practice Sudoku PDFs
Focused printable practice packs filtered by specific Sudoku solving techniques such as X-Wing, Swordfish, and XY-Wing.
Master Specific Techniques
Choose a Sudoku solving technique below to read targeted tutorials and download practice PDF worksheets built specifically for that logic pattern.
Naked Single Practice
The absolute foundation of Sudoku. A Naked Single occurs when a cell has only one possible candidate remaining.
Requires Level 1+Hidden Single Practice
A Hidden Single happens when a specific digit can only be placed in one exact cell within a particular row, column, or 3x3 block.
Requires Level 2+Pointing Practice
When candidates for a digit in a 3x3 block are confined to a single row or column, pointing to eliminations outside the block.
Requires Level 3+Claiming Practice
When candidates for a digit in a row or column are confined to a single 3x3 block, claiming the digit for that block.
Requires Level 3+Naked Subsets Practice
Naked Pairs, Triples, and Quads happen when N cells share exactly N candidates, allowing you to eliminate those candidates from other cells.
Requires Level 3+Hidden Subsets Practice
Hidden Subsets occur when N digits are restricted to exactly N cells within a region, though other candidates may also be present.
Requires Level 5+X-Wing Practice
The X-Wing is an essential intermediate technique where a digit is restricted to a perfect rectangle across two rows and two columns.
Requires Level 6+Swordfish Practice
The Swordfish is a powerful 3-row, 3-column extension of the X-Wing logic, eliminating candidates across a grid.
Requires Level 7+Jellyfish Practice
The Jellyfish is a massive 4-row, 4-column fish pattern, requiring exceptional vision to spot and execute.
Requires Level 6+XY-Wing Practice
Also known as a Y-Wing, this technique uses three intersecting bi-value cells to force eliminations.
Requires Level 7+XYZ-Wing Practice
An extension of the XY-Wing that includes a tri-value pivot cell, eliminating candidates seen by all three cells.
Requires Level 7+WXYZ-Wing Practice
An advanced 4-cell wing logic based on restricted combinations.
Requires Level 7+VWXYZ-Wing Practice
A diabolical 5-cell wing pattern requiring intense multi-step reasoning.
Requires Level 7+XY-Chain Practice
A sequence of bi-value cells forming a chain that forces a deduction at the endpoints.
Requires Level 7+X-Cycle Practice
A chain technique focusing on a single digit. Also known as Single Digit Coloring.
Requires Level 7+Chute Remote Pairs Practice
A specific pattern of identical bi-value cells forming a long-distance connection.
Requires Level 6+2-String Kite Practice
A single-digit pattern combining row and column restrictions crossing through a common block.
Requires Level 6+Skyscraper Practice
A widely used single-digit pattern consisting of two conjugate pairs that don't perfectly align.
Requires Level 6+Turbot Fish Practice
A broad category covering odd-length single-digit chains, including Skyscrapers and Kites.
Requires Level 7+Strong Links Practice
Advanced chains relying entirely on strong links (bivalue or conjugate pair relationships).
Requires Level 7+Grouped Patterns Practice
Extensions of standard single-digit patterns where nodes can be clusters of cells.
Requires Level 5+Unique Rectangles Practice
Deadly pattern avoidance: using the rule that a Sudoku has exactly one valid solution to force deductions.
Requires Level 6+BUG Practice
Another uniqueness-based technique used when almost all unsolved cells have exactly two candidates.