Puzzle promoter Sam Loyd invented "Saddle the
Horse" in 1872. Loyd sold the concept to P.T. Barnum (of Barnum and
Bailey circus fame), who handed out millions of them to circus-goers
under the name "P.T. Barnumís Trick Mules."
It has since taken on many variations, from clowns on donkeys to
witches on black cats, and has delighted generations of puzzle lovers
around the world.
The solution is shown in the figures. Please note that the pieces are
shown in their orientation that clearly shows the puzzle's idea.
Different parts of the cards now form two new galloping horses. In the
bottom drawing we outlined with the red lines these two new horses
with their riders. What a race!