Cast W-U - metallic puzzle by Hanayama

The aim of this game is to remove the ring from the game and put it back in. The idea for this puzzle comes from the "Horse" puzzle also available in the Cast Puzzle series. The "Horse" puzzle was derived from a puzzle attained in California, one that was made with real horseshoes. With the W-U puzzle, the difficulty is ramped up considerably over the original "Horse" puzzle. I hope your frustration level ramps up, as well. The key word is "hoof."