a.k.a. Motor Garage Puzzle, Parka Car, Sputnik Puzzle, E Peg Puzzle
Designed by H. E. Dudeney 1910, made by Binary Arts circa 2000.
(metal with plastic case, 2.5 inches)

Slide the pieces to exchange "WORK" and "GOLF":



Presented in Dudney's 1917 book Amusements in Mathematics as the Motor Garage Puzzle, which also presents the smaller Motor Car Puzzle; both of these puzzles can be played on-line on Baxter's Page. McFarren's Page presents a step by step solution. Hordern's book credits Dudney's 1910 submission to the Strand Magazine. Here is the 43 moves (85 straight-line moves) solution from page 27 of the 1942 Filipiak book (steps 6 and 7 have been corrected and letters are used instead of numbers to the left of arrows):



Further Reading
Work Or Golf Solution Steps (43 rectilinear, 85 straight-line, 150 unit)
Work Or Golf Solution Steps (43 rectilinear, 83 straight-line, 154 unit)
McFarren's Page, from: http://www.geocities.com/abcmcfarren/math/golf.htm
Baxter's Page, from: http://www.johnrausch.com/SlidingBlockPuzzles/classic.htm
DeVos Patent, from: www.uspto.gov - patent no. 4,097,049