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Case 55: who took the Gold Necklace?

Difficulty: ★★★★★ · Board 12×12 · 10 suspects

This morning, the staff at the museum found that the Gold Necklace, kept in the Reception Area, is no longer where it should be. No one remembers seeing a stranger come in, so the thief must be one of the people already inside. Help the police unmask them.

The board

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Suspects and clues

Remember the rules: no two suspects (nor the item) ever share a row or a column, each character is in a different room, and the thief is the only one sharing a room with the stolen item. Unsure? Read how to play and the clue types.

Solution

Try it yourself first: pen and paper are enough. When you want to check, open the reasoned solution.

Show the step-by-step solution
  1. Omar's clue: He's 10 rows away from the Archive. 2 cells remain possible: F12 and G12.
  2. Nadia's clue: She's in a corner, 2 columns away from the Inner Courtyard, and in row 2. It leaves a single cell: G2.
  3. Ines's clue: She's 2 rows away from the Restoration Room. 2 cells remain possible: B7 and A8.
  4. Bilal's clue: He's 2 rows away from the Reception Area. 2 cells remain possible: K5 and L5.
  5. Chidi's clue: He's 4 columns away from the Restrooms and in the Cloakroom. It leaves a single cell: J10.
  6. Sven's clue: He's 4 columns away from the Inner Courtyard and in column C. It leaves a single cell: C6.
  7. Priya's clue: She's 3 rows away from the Exhibition Hall. 4 cells remain possible: B3, A4, A10 and B10.
  8. Esteban's clue: He's 2 rows away from the Lobby. 3 cells remain possible: C9, D9 and E9.
  9. Diego's clue: He's 8 columns away from the Workshop. It leaves a single cell: L8.
  10. Grace's clue: She's 4 rows away from the Lobby. 3 cells remain possible: C11, D11 and E11.
  11. The stolen item's clue: It's 3 rows away from the Cloakroom. 3 cells remain possible: I3, J4 and H12.
  12. Nadia can only be on G2. No one else can be in row 2 or column G, and no other character can be in the Archive.
  13. G12 has already been ruled out, so Omar can only be on F12. No one else can be in row 12 or column F, and no other character can be in the Main Hall.
  14. Chidi can only be on J10. No one else can be in row 10 or column J, and no other character can be in the Cloakroom.
  15. Sven can only be on C6. No one else can be in row 6 or column C, and no other character can be in the Lobby.
  16. Diego can only be on L8. No one else can be in row 8 or column L, and no other character can be in the Reception Area.
  17. A8 has already been ruled out, so Ines can only be on B7. No one else can be in row 7 or column B, and no other character can be in the Exhibition Hall.
  18. L5 has already been ruled out, so Bilal can only be on K5.
  19. B3, A10 and B10 have already been ruled out, so Priya can only be on A4.
  20. C11 and E11 have already been ruled out, so Grace can only be on D11. No one else can be in row 11 or column D, and no other character can be in the Security Room.
  21. C9 and D9 have already been ruled out, so Esteban can only be on E9.
  22. J4 and H12 have already been ruled out, so the Gold Necklace can only be on I3.

Conclusion: Bilal is the only person sharing the Inner Courtyard with the Gold Necklace, which is on I3. He is the thief.

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