Eric's Links for the
Chinese Cross Puzzle "Luban Suo"
Reference web pages in Chinese
Martin Gardner's The Colossal Book of Mathematica: Classic Puzzles, Paradoxes and Problems.
The first Chinese magic and puzzle treastise published in 1889.
Link to the discussion why Luban Suo is also called Kongming Suo as well as the solutions to 2 most common variants of this puzzle..
see Frontispiece details list