The Five Shelves: Petrova, Lindqvist, Vásquez, Tanaka, and Moreau
Verified— unique solution
zebra
Five shelves stand in a row, numbered 1 to 5 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 spiral-bound edition is not the author with the black cover.
2. The science-fiction writer is not the author with the gold cover.
3. The author whose book holds a ticket stub is immediately to the left of the science-fiction writer.
4. The author with the paperback is immediately to the right of Vásquez.
5. The memoirist is somewhere to the left of the author whose book holds a postcard.
6. Petrova is immediately to the right of the mystery writer.
7. The author with the hardback is somewhere to the left of Lindqvist.
8. The author whose book holds a ticket stub is directly next to Lindqvist.
9. The author with the gold cover is not the memoirist.
10. The author whose book holds a postcard is somewhere to the left of Lindqvist.
11. The author with the leather-bound edition is immediately to the left of the author whose book holds a ribbon bookmark.
12. The author whose book holds a feather is somewhere to the left of the author with the cloth-bound edition.
13. The historian is immediately to the left of the author whose book holds a postcard.
14. Lindqvist is directly next to the author with the spiral-bound edition.
15. The author with the red cover is immediately to the right of the author with the white cover.
16. The author with the green cover is immediately to the right of the author with the black cover.
17. Tanaka is somewhere to the left of the author with the paperback.
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 (1–5) does “Tanaka” end up at? Answer with the number.
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