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Challenging cases you can work through on your own.
Practice on your own, then check your thinking against a sample answer.
Inspired by real consulting insights
Cases draw on McKinsey, BCG, and Bain insight articles. Read the real article after each case.
Three levels of difficulty
Beginner, Intermediate, and Final round readiness. Start where you are today.
Exhibits that challenge you
Complex charts like the ones that catch candidates off guard in real interviews.
For a good cause
ChocolaCase is free. In return, we kindly invite you to give $5 to a nonprofit you care about, so the help you get here reaches someone else too.
Built for self practice. It does not replace live mocks with another person, so keep doing those too.
One small ask before you begin.
There is no fee to use this tool. If you are able, we invite you to give $5 to a nonprofit you care about, so the help you find here can reach someone else too. Choose one of our suggestions or any cause close to your heart.
We can't check, and we won't. But the universe keeps its own books.
ChocolaCase is for practicing problem solving skills only. It is not affiliated with McKinsey, BCG, Bain, or any other consulting firm, and its questions are not real cases. Case content was built with the help of AI and reviewed by volunteers with consulting experience, in a personal capacity. Meet the people who helped.
Privacy: your progress is saved in this browser only. A pledge stores the nonprofit name and a scrambled, unreadable form of your internet address, used only to prevent duplicate counts. If you switch on Record, your recordings are also kept in this browser only, for up to 7 days, and are never uploaded. Admin