26. The Western Army Keeps the Peace
Secrets of Strategy, Vol. 2: 176 classical compositions
16 moves
西军保安 — "The Western Army Keeps the Peace" Problem 26 of 韬略元机, volume 2 (韬略元机残局谱). Transcribed from http://www.dpxq.com/hldcg/search/view_u_43660.html