It is not possible to create a puzzle that a computer cannot solve, since computers are capable of solving any problem that can be expressed in a clear and precise way using a finite set of rules. However, it is possible to create puzzles that are difficult or time-consuming for computers to solve, especially if the puzzles involve complex or open-ended tasks that require creativity, intuition, or other forms of human intelligence.

One example of a puzzle that might be difficult for a computer to solve is a riddle or brain teaser that requires understanding and interpretation of natural language or figurative language. For instance, a riddle that asks "What has a heart that doesn't beat?" might be difficult for a computer to solve, since it requires understanding the figurative meaning of the word "heart" and recognizing that the answer is "a deck of cards."

Another example of a puzzle that might be difficult for a computer to solve is a visual or spatial puzzle that requires visualization or manipulation of three-dimensional objects. For instance, a puzzle that involves fitting a set of interlocking shapes into a specific pattern might be difficult for a computer to solve, since it requires understanding the spatial relationships between the shapes and finding a solution that satisfies the constraints of the puzzle.

Overall, while it is not possible to create a puzzle that a computer cannot solve, it is possible to create puzzles that challenge and engage the human mind in ways that are difficult for computers to replicate.