炮打四門

《蕉竹齋象棋譜》：七十五局古譜殘局

31 手

炮打四门 — "The Cannon Strikes Four Gates" Problem 56 of 蕉竹斋象棋谱. Transcribed from http://www.dpxq.com/hldcg/search/view_u_42773.html