Haydn Sonata no. 50 C major

[thaicheow]

Hi,
Dunno where to post this topic. Might as well just put it here. May be those who has tought this piece can give me some advice.

1. What does the "open pedal" in 1st movement means? Should I press the damper pedal? Or just leave it. As some told me it is just an idea of suspended chords, etc.

2. What is the fuss about this piece? It seems like a lot of great pianists like to perform this piece: Ritcher played it in his carnagie hall debut, Lang lang played it in carnagie hall too, and a lot of contestants in the competition love to play it. Is it haydn's much later sonata? What does the title "English" mean? Does it mean he composed it after he move to British?

3. If you teach this piece,  what do you expect a performer to show in this piece? It seems no very deemanding (technically),  but yet I found it tricky to grasp 100%-ly on all the notes, especially the double 3rd in 1st movement. Any suggestions?

Thanks.