6. Withdraw, reflect, mend your faults
Secrets of the Golden Roc: 18 classical compositions
19 moves
Composition 6: 退思補過, "Withdraw, reflect, mend your faults". Red to move; the printed verdict is 勝. The line is the book's printed solution, kernel-verified.
The book closes here with 勝. The verdict is exact: red now has a forced mate in 7 (engine-verified).