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One-sided Pentominoes — image 1
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One-sided Pentominoes

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There are 18 one-sided pentominoes. There are many puzzling challenges for the one-sided pentominoes

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Puzzle description: There are 18 one-sided pentominoes because six of the usual two-sided pentominoes change their shape when flipped over. There are many challenges for the one-sided pentominoes: https://puzzler.sourceforge.net/docs/pentominoes.html#one-sided-pentominoes 

If you can read German: Mehr Aufgaben für einseitige Pentominos: https://welt-der-geduldspiele.blogspot.com/2025/10/aufgaben-fur-einseitige-pentominos-nr-1.html

Puzzle difficulty: Dfferent for the various problems. From beginner to expert. 

Printing instructions: The pentominoes are modeled using PuzzleCAD: https://www.thingiverse.com/thing:3198014. On top of a usual pentomino (in red) is a copy reduced in size (in silver). The slicer automatically finds the correct height for a filament change. Prints are fine with no supports, but need a manual filament change. I printed the puzzle in PLA at 0.1 mm layer height.

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