76. Digging the Moat, Raising the Wall
Secrets of Strategy, Vol. 2: 176 classical compositions
26 moves
凿池筑城 — "Digging the Moat, Raising the Wall" Problem 76 of 韬略元机, volume 2 (韬略元机残局谱). Transcribed from http://www.dpxq.com/hldcg/search/view_u_43710.html