River crossing puzzle and LLMs

[from https://the-decoder.com/llms-give-ridiculous-answers-to-a-simple-river-crossing-puzzle/]
Here is the simplest river crossing puzzle:

A farmer needs to cross a river with two chickens.
The boat only has room for one human and two animals.
what is the smallest number of corssing needed for the farmer to get across with the two chickens?

ChatGPT-4o can not give correct answer:

As usual, i trust ChatGPT and believe bad performance is caused by openai’s business model: restrict computation resources for each conversion. So, i added this generic prompt at the end of the problem:

Check origin statements, find hidden restrictions, and restate the problem with your own word carefully, then solve the problem.

Then chatGPT-4o gives me correct answer.