Just like the previous chamber, there's a cube stuck in a pit.
What do I do?
In the previous chamber, you created a portal beneath the cube to make it easier to reach. Try doing that again here.
Hmm...
Performing the same trick here seems to move the cube from an annoyingly low spot to annoyingly high one.
Your portal moved it - what else can it do?
Jump through the portal you made in the pit (or just make a new one in walking distance) and step through it.
You'll end up on the same platform as the cube, and can throw it down onto a button.
Two buttons require two cubes. Time to grab the other one.
Guide help
This is the low-spoiler guide for "The cube in the pit" puzzle in Portal. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.
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