US
United States · Amazon.com
United States list price: $9.99 USD
A local marketplace price and purchase path are available for this delivery country.
View on Amazon.comGridHearth Puzzles · Volume 3
Hard Sudoku Practice: Volume 3
180 Puzzles with Naked Triples, X-Wings, a Solving Loop, and Complete Solutions
Verified US paperback offer on Amazon.com
Paperback · 8.5 × 11 inches · 122 pages · black ink on white paper
Practice the next logical moves
For adults who already use singles, locked candidates, and pairs. This volume brings together 180 Hard 9 × 9 puzzles, four worked examples for naked triples and X-Wings, a repeatable six-step solving loop, and complete numbered solutions.
Each puzzle has one solution and can be solved without guessing using the stated Medium prerequisites plus naked triples and X-Wings. This is guided Hard practice, not a complete beginner course.
- Puzzles
- 180 Hard puzzles · two per practice page
- Practice grid
- At least 4 inches per side
- Instruction
- Row/column naked triples · row/column X-Wings · six-step loop
- Solutions
- Complete, numbered answer grids
- Author
- GridHearth Puzzles
- US offer
- Amazon.com · check delivery availability for your location
- Paperback ISBN
- 9798176435351
- Amazon ASIN
- B0HKQCVKFN
Inside the book
Four worked examples, then practice
One naked-triple example uses a row and another uses a column. The two X-Wing examples show the row-based and column-based forms. The six-step loop revisits singles, locked candidates, and pairs before these Hard patterns, then updates candidates and repeats.
Practice grids measure at least 4 inches per side; the answer key is compact. This is not a large-print edition throughout.
Paperback marketplaces
Choose a delivery country
This English product page stays the same. Your selection only changes the marketplace information shown here.
Showing all registered delivery-market states. Select a country to focus on its current marketplace details.
Another country or region · Amazon.com
Amazon will show whether delivery is available and the final checkout values for your destination.
Check delivery on Amazon.comMarketplace checkout price, taxes, shipping, stock, delivery, and import terms may vary by destination and time. We do not use IP geolocation for this selection.