The scene
Nébula Escape Room · Lobby challengeThe escape room's master token vanished from the preparation box. Three instructors had tested the system with different cards and bags, assigned without repeating colours or shapes.
The box retained two conditions of access: the card it accepted and the size of the bag used to carry the token. Reconstructing just one of those details is not enough to solve the case.
What we know for certain
One person opened the box with their own card and carried the token in their own bag. They did not lend cards or bags to one another. The three colours were red, green and blue; the three shapes were square, triangular and round, with each person receiving a different colour and shape.
The three accounts
Héctor Riu
North group instructor«My card was not red, and my bag was square.»
Lola Grau
Central group instructor«My card was blue. My bag was not round.»
Adrià Ros
South group instructor«I had the third card colour and the bag neither of the other two received.»
Examine the evidence
0 of 5 openedOpening these five clues does not cost points.
01The card filter
During the disappearance, the box accepted red and blue cards but rejected every green card. There was no mechanical key or other way to open it.
02The bag filter
The token could be removed only inside a bag, through a twenty-centimetre opening. Square and triangular bags fitted; round bags measured twenty-five centimetres and could not be compressed.
03The card allocation
Lola received blue, and Héctor did not receive red. Colours were not repeated, and only red, green and blue were distributed.
04The bag allocation
Héctor received the square bag. Lola did not receive the round one. Shapes were not repeated, and nobody had a second bag available.
05The observed operation
The log confirms an accepted opening and an entire bag passing through the aperture. The token was not removed by hand, and no bag was left outside while the box was opened.