Penta-Pac (IPP17) by Leslie Shader
Every Penta-Pac puzzle created by Mr. Shader has a unique solution, so this is a one-of-a-kind puzzle. A constrained packing puzzle. Fit all 8 pentominoes into a box with fixed rod obstruction. An ingenious puzzle that will keep you busy! This was Les' Exchange Puzzle at IPP 17 in 1997. With solution and original description.
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