Second key · The Dragon Turns at the Pool's Floor

What the solver found: an exact audit of the classical manuals

13 moves

The Dragon Turns at the Pool's Floor (龙翻潭底) — Elegant Pastime Manual (適情雅趣, 1570), no. 35 The book opens Cxe7+ and mates in 7. So does Rxd10+: the key is not unique. The mainline is the book’s solution; a branch, where there is one, is what the solver found. Record from dpxq.co…