The team will walk into a theatre to see a roughly 3 minute video playing on a loop with roughly 30 seconds between loops.
This is a "change blindness" puzzle (see this video for an example). In the video, an Illudo and a "volunteer from the audience" demonstrate how to perform a magic trick. None of the trick is relevant to the puzzle. None of the discussion (or any sound of any kind) is relevant to the puzzle. During the trick demonstration, 6 objects will sneakily change while out of view. The point of the puzzle is to identify the 6 objects that changed and the order they changed in. The 6 objects that change (in order) are:
- ** C**ALENDAR
- C** H**AIR
- CH** A**LKBOARD
- PLA** N**T
- BACK** G**ROUND
- HOODI** E**
With this information, indexing by order (sometimes called a diagonal extraction, in bold above) gives the final answer: CHANGE.
We have avoided using any "number words" (like 'first', 'two times', etc.) in the discussion.
The card that plays a major role in the trick is a 6. This is not required, but it can serve as a hint towards how many changes they will need to acquire.
Common sources of issues:
Not knowing how many changes to look for.
There are two keys in place to indicate this:
The card that plays a major role in the trick is a 6.
There is a zoom in and a zoom out for each change. Many teams have used this as an indication of how many changes to look for.
Not identifying the correct canonical names for each object.
The 2 most difficult are referenced in the discussion: BACKGROUND, and HOODIE
It is common to use CHALKBOARD, BOARD, or BLACKBOARD for that object. All 3 have an "A" in the 3rd spot and will work just fine.
All 6 correct versions of the words are partial answers with "Keep going" as a response
It is common to refer to the BACKGROUND as a "BACKDROP", which is a problem. The word "BACKGROUND" is used distinctively in the discussion as mentioned above in an attempt to help with this.
Noticing that the plant might have changed, but remaining unconvinced.
- I'm not sure how to help with this, the plant is quite different! This has always ended the right way on its own - but I'm mentioning it just in case.
Not knowing what to do once the 6 words have been acquired.
Most teams have not had major issues with the last step, but hinting towards paying attention to the order they occurred in is a good way to help this without giving it completely away.
If you want to hint further, I would suggest asking if they have any numbers available to potentially use as an index.