Stomachion or Ostomachion Puzzle Worlds Oldest by

The Stomachion is perhaps the worlds oldest puzzle, and it is very diffiucult to solve. It is attributed to Archimedes of Greece (287 BC - 212 BC). The 14 precision cut acrylic pieces ,1/4 thick, will make a square and also many other interesting shapes, with each shape requiring all the pieces. It

The Stomachion – The world's oldest maths puzzle - Maths Careers

Archimedes Square Stomachion Puzzle – Red Hen Toys

Stomachion or Ostomachion Puzzle – Smith Galleries

Loyd Polyonimoes - Makes all Pentominoe shapes & more

The Stomachion Puzzle is Available for Purchase – Creative Escape Rooms

Archimedes Ostomachion Math Puzzle - Teach Beside Me

Stomachion or Ostomachion Puzzle Worlds Oldest by

Stomachion Puzzle Handmade Ancient Puzzle Hard Dissection - Denmark

Puzzle with over 500 different solutions. : r/mildlyinteresting

MathWorld News: Playing in the Sandreckoner's Box

Stomachion or Ostomachion Puzzle Worlds Oldest by

MathWorld News: Playing in the Sandreckoner's Box