Hard Sudoku Puzzles
250 Large-Format Brain Teasers with Playing Tips and Solutions
- Expert-level: Designed for experienced solvers.
- Learn by doing: Includes Triples, Quads, and X-Wing alongside Pairs, Pointing, and Claiming.
- Get started fast: 50 puzzles include pre-filled candidate notes to show how pros set up a grid.
- Two puzzles per page: Spacious A4 pages leave plenty of room for neat pencil marks.
- Paper + online: Scan a QR code for every puzzle to play digitally at headscratcher.world.
- Solutions included: Complete solution grids for every puzzle.
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