308. The Three Armies Joined in Line

Elegant Pastime Manual, Vol. 4: 91 classical compositions

7 moves

三军联位 — "The Three Armies Joined in Line" Problem 308 of 適情雅趣, volume 4 (卷四). Transcribed from http://www.dpxq.com/hldcg/search/view_u_43290.html