438. Attacking from Left and Right Together
Elegant Pastime Manual, Vol. 5: 90 classical compositions
7 moves
左右并攻 — "Attacking from Left and Right Together" Problem 438 of 適情雅趣, volume 5 (卷五). Transcribed from http://www.dpxq.com/hldcg/search/view_u_43155.html