Roboku
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Case 49: who took the Medieval Codex?
During the night rounds at the library, a guard raised the alarm: the Medieval Codex, which should be in the Reading Room, is missing. Everything points to the thief still being among those present. Help the police unmask them.
The board
- 1Office
- 2Café
- 3Study Room
- 4Storage Room
- 5Reception Area
- 6Reading Room
- 7Conference Room
- 8Restoration Room
- 9Vault
- 10Children's Room
- 11Lobby
- 12Restrooms
- Plant: no character can stand on its cell, but the stolen item can be there.
- Seat: anyone can be on it.
- Shelf: no character can stand on its cell, but the stolen item can be there.
- Table: nothing can be on its cell.
- Screen: nothing can be on its cell.
Suspects and clues
- DDiego
He's right next to the Reception Area. - AAmara
She's in the Restrooms and 4 rows away from the Restoration Room. - PPriya
She's 9 columns away from the Storage Room. - NNadia
She's 5 rows away from the Reading Room. - WWendy
She's in the Reception Area. - BBoris
He's 8 rows away from the Conference Room. - GGrace
She's not in the Lobby. - HHana
She's in column H. - JJavier
He's in row 2. - MMedieval Codex (stolen item)
It's not next to any wall.
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
- Diego's clue: He's right next to the Reception Area. 11 cells remain possible.
- Amara's clue: She's in the Restrooms and 4 rows away from the Restoration Room. It leaves a single cell: A10.
- Priya's clue: She's 9 columns away from the Storage Room. 2 cells remain possible: K1 and J5.
- Nadia's clue: She's 5 rows away from the Reading Room. It leaves a single cell: E11.
- Wendy's clue: She's in the Reception Area. 4 cells remain possible: C7, D7, E7 and F7.
- Boris's clue: He's 8 rows away from the Conference Room. It leaves a single cell: B1.
- Grace's clue: She's not in the Lobby. 73 cells remain possible.
- Hana's clue: She's in column H. 7 cells remain possible.
- Javier's clue: He's in row 2. 11 cells remain possible.
- The stolen item's clue: It's not next to any wall. 11 cells remain possible.
- Amara can only be on A10. No one else can be in row 10 or column A, and no other character can be in the Restrooms.
- Nadia can only be on E11. No one else can be in row 11 or column E, and no other character can be in the Vault.
- Boris can only be on B1. No one else can be in row 1 or column B, and no other character can be in the Storage Room.
- K1 has already been ruled out, so Priya can only be on J5. No one else can be in row 5 or column J, and no other character can be in the Lobby.
- Every cell still open to Wendy is in row 7, so no one else can be in that row.
- Every cell still open to Hana is in column H, so no one else can be in that column.
- Every cell still open to Javier is in row 2, so no one else can be in that row.
- H2, H3, H4, H5, H7 and H8 have already been ruled out, so Hana can only be on H6. No one else can be in row 6 or column H, and no other character can be in the Office.
- Every other cell the clue allowed has already been ruled out, so Diego can only be on C8. No one else can be in row 8 or column C, and no other character can be in the Conference Room.
- Every cell still open to Javier is in the Study Room, so no other character can be there.
- Every cell still open to Grace is in column D, so no one else can be in that column.
- C7, D7 and E7 have already been ruled out, so Wendy can only be on F7. No one else can be in row 7 or column F, and no other character can be in the Reception Area.
- Every other cell the clue allowed has already been ruled out, so Javier can only be on G2.
- Every other cell the clue allowed has already been ruled out, so the Medieval Codex can only be on I3. No one else can be in row 3 or column I.
- Every other cell the clue allowed has already been ruled out, so Grace can only be on D4.
Conclusion: Priya is the only person sharing the Lobby with the Medieval Codex, which is on I3. She is the thief.