The Four Shelves: Lindqvist, Tanaka, Vásquez, and Okafor
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 cloth-bound edition is the author with the blue cover.
2. Tanaka is directly next to Okafor.
3. The author with the boxed set is Tanaka.
4. The author with the green cover is Vásquez.
5. The author with the spiral-bound edition is directly next to Lindqvist.
6. The author with the spiral-bound edition is Okafor.
7. The author with the green cover is immediately to the right of the author with the white cover.
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 “Lindqvist” end up at? Answer with the number.
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