第542局 固前遮後
1 手
固前遮后 — "Firm in Front, Screened Behind" Problem 542 of 適情雅趣, volume 6 (卷六). The source gives its answer in prose rather than as a line, which is what a draw study usually needs: 「红炮保和局」 「红有闲着可走，故和。」 Transcribed from http://www.dpxq.com/hldcg/search/view_u_43259.html