Hard printable logic puzzles

For solvers who finished the easy ones over breakfast. These sheets use 9×9 and 10×10 boards with eight to ten threads, so the long paths twist around each other and the first move is rarely obvious. The rule stays the same: connect every pair of matching numbered buttons with one thread, never cross threads, and fill every square. Each puzzle has exactly one solution, checked by a solver, and the generator throws away boring boards full of straight lines. Look for forced corners, squares only one thread can reach and threads that would cut the board in two. The answer is on page two with a bonus puzzle. The coloring pages are dense mandala-like cross-stitch patterns. Print on A4 or US Letter.

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