Roboku
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Case 32: who took the Star Sapphire?
An urgent call has come in from the staff at the theater: the Star Sapphire, normally kept in the Lobby, has been stolen. The theft must have happened at some point during the day without anyone noticing. Help the police unmask the thief.
The board
- 1Storage Room
- 2Makeup Room
- 3Stage
- 4Restrooms
- 5Box Office
- 6Café
- 7Props Room
- 8Rehearsal Room
- 9Private Box
- 10Lobby
- 11Office
- 12Costume Room
- 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
- YYusuf
He's in column F. - BBilal
He's 6 rows away from the Restrooms. - IInes
She's 3 columns away from the Private Box and 5 columns away from the Storage Room. - MMatthew
He's next to a screen. - AAmara
She's 9 columns away from the Box Office. - NNadia
She's in the Restrooms. - SStar Sapphire (stolen item)
It's next to a seat, and it's not in the Makeup Room.
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
- Yusuf's clue: He's in column F. 7 cells remain possible.
- Bilal's clue: He's 6 rows away from the Restrooms. 2 cells remain possible: G1 and E3.
- Ines's clue: She's 3 columns away from the Private Box and 5 columns away from the Storage Room. It leaves a single cell: H8.
- Matthew's clue: He's next to a screen. It leaves a single cell: J9.
- Amara's clue: She's 9 columns away from the Box Office. It leaves a single cell: A4.
- Nadia's clue: She's in the Restrooms. 6 cells remain possible: G7, F8, G8, E9, F9 and E10.
- The stolen item's clue: It's next to a seat, and it's not in the Makeup Room. 2 cells remain possible: B1 and A2.
- Ines can only be on H8. No one else can be in row 8 or column H, and no other character can be in the Stage.
- Matthew can only be on J9. No one else can be in row 9 or column J, and no other character can be in the Rehearsal Room.
- Amara can only be on A4. No one else can be in row 4 or column A, and no other character can be in the Costume Room.
- A2 has already been ruled out, so the Star Sapphire can only be on B1. No one else can be in row 1 or column B.
- G1 has already been ruled out, so Bilal can only be on E3. No one else can be in row 3 or column E, and no other character can be in the Makeup Room.
- F8, G8, E9, F9 and E10 have already been ruled out, so Nadia can only be on G7. No one else can be in row 7 or column G, and no other character can be in the Restrooms.
- F1, F3, F4, F7, F8 and F9 have already been ruled out, so Yusuf can only be on F5.
Conclusion: Amara is the only person sharing the Costume Room with the Star Sapphire, which is on B1. She is the thief.