521. Trading the Horse, Hiding by the Tree
Elegant Pastime Manual, Vol. 6: 83 classical compositions
3 moves
易马隐树 — "Trading the Horse, Hiding by the Tree" Problem 521 of 適情雅趣, volume 6 (卷六). Transcribed from http://www.dpxq.com/hldcg/search/view_u_43238.html