I phoned the company and they are sending me an instruction sheet by email.

In the meantime, I have been trying to put the chair together.  The sucker weighs 23 kg and the back of the chair is the only thing I really can't figure out.  Three holes on the back's slot attachment would seem to match up with the three holes underneath the seat and the three screws.  Now, if the would only align.  In the meantime, I think I have started my own Olympic sport-- chair assembly.  

Points will be awarded based on difficulty of assembly and awkward positions during assembly and a combination score based on weight of parts held and the duration of the hold.  

So far, it's been like yoga with weights and the danger I would drop heavy things on my head.

My husband really misses all the good stuff.

I finally got my chair put together.  I had a three hour hiatus during which I ate nachos and watched "The Unit" I returned for the gold medal finals and got my medal.

It was really hard to attach the chair to the bottom.  Nothing seemed to line up nicely and it was hard to get those screws to go all the way in so they didn't. I lost a few points on this part. They are as snug as I can make them and that will have to do. I ended up balancing the chair back on my legs and the seat on my tummy.  The judges were particularly pleased that I was able to incorporate stairs into my construction so I made extra points there.  Result?  A gold medal chair for moi!

I told my husband about Olympic Chair Assembly.  He seems to think I won't have much competition (as in most people won't join the fun).

The chair is really comfortable.  I mean really, really comfortable.  I can see my work output increasing because of this chair.

I am impressed that you took it on and most importantly persisted.  I might have tried but if I had a hard time, I would have been chasing someone down to help me.  I am mechanically challenged.  I can't even hang up window blinds.