TAOCP 7.2.2.1 Exercise 58
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Section 7.2.2.1: Dancing Links
Exercise 58. ▶ [22] [22] (A. Thoen and A. van de Wetering, 2019.) Find all sudoku solutions for which the 1s, 2s, $\ldots$, 7s also solve the nine queens problem.
Verified: no
Solve time: 6m20s
Working