The Chess Mind

Or are there any errors at all? Click here for your starting position and the game's remaining moves. I'll offer a hint in a few days; meanwhile, keep your chess engines off! (Reminder: if you think you have the solution, please do not post it, or make statements that might provide a hint, in the comments section. You're welcome to use the Contact link to confirm your solution privately, however.)

A few posts ago, I presented the concluding moves of a recent pawn ending, challenging the reader to find the mistakes - if any. When I first saw this ending, I understood everything just about immediately; not because I'm so bright or because of my new but sadly unofficial IM title, but because I've had almost exactly the same ending! So if you want a (big) hint, have a look here.

In this post I presented the problem, and in a second post I linked to a (very big) hint to help the reader solve it. If any mystery remains, post-hint, it will now dissipate into a cloudless sky of complete understanding - or so I hope. Enlightenment is available here.

[Kudos to Chris Falter, who submitted a perfect, complete solution.]