Dual · Three Worthies Die for the State

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

13 moves

Three Worthies Die for the State (三贤殉国) — Deep as the Sea (渊深海阔, 1808), no. 70 At move 6 the book plays Re10+; Rf9# mates just as fast. A dual. The mainline is the book’s solution; a branch, where there is one, is what the solver found. Record from dpxq.com.