112雙燕爭飛
21 手
双燕争飞 — "Two Swallows Vie in Flight" Problem 112 of 梦入神机. Transcribed from http://www.dpxq.com/hldcg/search/view_u_42056.html
21 手
双燕争飞 — "Two Swallows Vie in Flight" Problem 112 of 梦入神机. Transcribed from http://www.dpxq.com/hldcg/search/view_u_42056.html