In a coastal town, a mysterious chest was found locked without a keyhole, yet it opened when the tide came in. What caused the chest to open?

Category: Story · Difficulty: hard

Hint: Think about natural forces interacting with physical mechanisms.

Answer

Water pressure on hidden latch

Explanation

The rising tide exerted water pressure that triggered a concealed latch, opening the chest without any key or magic.

This is a hard story riddle — a tricky one that takes a little thought. The answer is Water pressure on hidden latch.

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