TAOCP 7.2.2.1 Exercise 394
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Section 7.2.2.1: Dancing Links
Exercise 394. [29] [29] Show that every $5 \times 5$ futoshiki puzzle that has only five clues, strong, weak, or a mixture of both, has at least four solutions. Which puzzles attain this minimum?
Verified: no
Solve time: 7m18s
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