GridHearth Puzzles · Paperback on Amazon
180 Puzzles with Naked Triples, X-Wings, a Solving Loop, and Complete Solutions
Paperback available on Amazon in selected countries
Paperback · 8.5 × 11 inches · 122 pages · black ink on white paper
For adults who already use singles (one-answer moves), 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 singles, locked candidates, pairs, naked triples, and X-Wings. This is guided Hard practice, not a complete beginner course.
Inside the book
Four worked examples show how naked triples and X-Wings remove possible numbers in rows and columns. The six-step loop revisits singles, locked candidates, and pairs before these Hard patterns, then updates the possible numbers and repeats.
Practice grids measure at least 4 inches per side; the answer key is compact. Large print is not used throughout the book.
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