If you remember i failed portal (my blog) somewhere in chamber 15. After a second attempt i had to use sv_cheats* and the portal anywhere code which got me pasr that issue.
That got me past the jump, and allowed me to continue. However using cheats* can glitch the game. Portal 2 is a much better thought out game.
Eventually i got to the end
Some of the bonus challenges in portal strike me as needlessly silly so portal 2 is the better game. I still had the issues i mentioned before in the prior post.
*I just could not do it without – other platforms might be more nimble.