Eight waltzes were published during Chopin's lifetime (Opp. 18-64). Posthumously, five more were published by Julian Fontana (Opp. 69-70). After this, manuscripts have been found and published without opus numbers and seven have been published so far. With The Alfred edition numbers it's waltzes a little differently than the standard order most are used to. To be honest, there really is no standard order for the posthumous waltzes, but this is the order I believe is most common:|Post. waltz key| |"Standard" order| |Alfred order| Waltz in e-.............14..........................16Waltz in E..............15..........................15Waltz in Ab............16..........................14Waltz in Eb............17..........................18 Waltz in Eb(Sost.)....18..........................19Waltz in a-.............19..........................17Waltz in f#-............20..........................N/A*(*=The seventh published waltz is in f#- and is not in this edition. A recording and sheetmusic are available at the Piano Society).
1. Which Eb is 18 and which is 19?
2. Is your numbering according to Alfred's or the standard order? The keys indicate Alfred's but the no. 18 and 19 mixup indicates standard order.
3. What's the difficulty of no. 20 in F#?