第550局 勢不兩大
1 手
势不两大 — "Two Powers Cannot Both Prevail" Problem 550 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: 「马保和局」 「红马无法脱身，黑方得马后，单炮无法取胜。」 Transcribed from http://www.dpxq.com/hldcg/search/view_u_43267.html