The second of these test chambers is a challenge version of the first. Each has three rooms, each harder than the last. Can you figure them out? Play the maps in order, as starting with the challenge map guarantees your frustration. However, when you complete them, you will feel very accomplished. Even though one is a challenge version of the other, they are both complicated, so please make sure you have played through the campaign, so that you have a better idea of what to do. Definitely not for beginners, unless you have genius-level spatial skills.