The goal is to find a solution using the information provided in the case.
A solution using a smaller amount of time cannot exist.
In these, the player needs to seek solutions using objects or information he has discovered on the island.
I love specialists, the people out there with the knowledge to find solutions using technology that most of us will never really understand (or appreciate).
A better solution in terms of storage space and security is using a secret sharing scheme.
Other players may challenge the move if the tile is not a solution using proper arithmetic.
The classic solution with minimal life-style changes is using a well.
Basically make different solutions then use a spectrophotometer to see how much light is absorb.
In fact, its solution using the resolution system of inference is exponentially hard.
More formally, heuristics are based on experience; they can speed up the search for a solution using simple rules.