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Case 52: who took the Trident of Neptune?
The guard on duty at the aquarium admits, a little embarrassed, that he dozed off for ten minutes. When he woke up, the Trident of Neptune, resting in the Children's Room, was gone. He swears he doesn't snore that loudly. Help the police unmask the thief.
The board
- 1Maintenance Room
- 2Tank Room
- 3Children's Room
- 4Laboratory
- 5Terrace
- 6Storage Room
- 7Café
- 8Office
- 9Reception Area
- 10Diving Room
- 11Restrooms
- 12Main Aquarium
- 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.
- Window: the blue line on a wall.
Suspects and clues
- ZZara
She's in the Tank Room and 4 rows away from the Restrooms. - EEsteban
He's 1 row away from the Reception Area. - BBilal
He's 4 columns away from the Laboratory and 1 column away from the Main Aquarium. - CCarla
She's 3 rows away from the Maintenance Room. - DDiego
He's 7 columns away from the Café. - GGrace
She's 6 columns away from the Terrace. - HHugo
He's next to a plant. - AAmara
She's in the Restrooms and in row 8. - WWendy
She's 6 columns away from the Maintenance Room. - TTrident of Neptune (stolen item)
It's 7 rows away from the Office.
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
- Zara's clue: She's in the Tank Room and 4 rows away from the Restrooms. It leaves a single cell: F12.
- Esteban's clue: He's 1 row away from the Reception Area. 3 cells remain possible: J5, L5 and K6.
- Bilal's clue: He's 4 columns away from the Laboratory and 1 column away from the Main Aquarium. It leaves a single cell: C7.
- Carla's clue: She's 3 rows away from the Maintenance Room. 4 cells remain possible: C4, D4, B12 and C12.
- Diego's clue: He's 7 columns away from the Café. It leaves a single cell: I3.
- Grace's clue: She's 6 columns away from the Terrace. 3 cells remain possible: L1, L2 and L3.
- Hugo's clue: He's next to a plant. 2 cells remain possible: F4 and G5.
- Amara's clue: She's in the Restrooms and in row 8. 2 cells remain possible: E8 and F8.
- Wendy's clue: She's 6 columns away from the Maintenance Room. 2 cells remain possible: J8 and J9.
- The stolen item's clue: It's 7 rows away from the Office. 2 cells remain possible: H1 and I1.
- Zara can only be on F12. No one else can be in row 12 or column F, and no other character can be in the Tank Room.
- Bilal can only be on C7. No one else can be in row 7 or column C, and no other character can be in the Maintenance Room.
- C4, B12 and C12 have already been ruled out, so Carla can only be on D4.
- Diego can only be on I3. No one else can be in row 3 or column I, and no other character can be in the Diving Room.
- F4 has already been ruled out, so Hugo can only be on G5. No one else can be in row 5 or column G, and no other character can be in the Terrace.
- J5 and L5 have already been ruled out, so Esteban can only be on K6.
- F8 has already been ruled out, so Amara can only be on E8. No one else can be in row 8 or column E, and no other character can be in the Restrooms.
- J8 has already been ruled out, so Wendy can only be on J9.
- I1 has already been ruled out, so the Trident of Neptune can only be on H1. No one else can be in row 1 or column H.
- L1 and L3 have already been ruled out, so Grace can only be on L2.
Conclusion: Diego is the only person sharing the Diving Room with the Trident of Neptune, which is on H1. He is the thief.