Wooden Jack Puzzle

Wooden Jack Puzzle Woodworking Plan

This project builds a 6 piece wooden puzzle that when assembled makes a fully symmetrical jack (3 dimensional “+”). The puzzle is at least 50 years old, and thus is well outside any patent that may have existed. This version has only 4 different pieces and the pieces are deceptively simple.

This type of puzzle is commonly called a Six-Piece Burr Puzzle, and that there are sites, including one at IBM Research, that discuss it. There are 314 similar puzzles, and this is apparently the most symmetrical and fewest different pieces. It’s #2 in the list at the IBM site.

Some nice pictures, and the solution is posted at the bottom of the article

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