The Four Shelves: Tanaka, Okafor, Moreau, and Lindqvist

Verified— unique solution

zebra

Four shelves stand in a row, numbered 1 to 4 from left to right. Each holds exactly one of each attribute, and no attribute repeats. Work out the full arrangement from these clues: 1. The author with the blue cover is directly next to the author with the cloth-bound edition. 2. The author with the cloth-bound edition is the author with the black cover. 3. The author with the black cover is immediately to the left of Tanaka. 4. The author with the boxed set is the author with the blue cover. 5. Lindqvist is directly next to Okafor. 6. The author with the hardback is the author with the gold cover. 7. The author with the hardback is Okafor. 8. The author with the blue cover is Lindqvist.

Hints

Hint 1

Hint 2

Hint 3

Solution

Commit an attempt to unseal the proof. Write your answer — right or wrong, thinking it through is the point.

In the final arrangement, which numbered shelf (1–4) does “Okafor” end up at? Answer with the number.

Hints

Solution

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