Correct way to handle parts
On the Young Composer's Challenge web site (http://www.youngcomposerschallenge.com/preparing_scores.php), I found these directions for preparing a score:
In scores for full-orchestra, it is preferable to combine like instruments on a single staff such as Flute 1 & 2, or Clarinet 1 & 2. This reduces the number of staves needed on the page and thereby allows each staff to be larger and easier to read. Never combine more than two instruments on a single staff.
When two instruments are combined on a single staff and there is a single line to be played by the first player only, indicate "1.” (1 with a period) just before the first note of that passage. This is short-hand for "1st". To indicate that the part is to be played by the second player only, indicate "2." To indicate that the part is to be played by both players, indicate "a2" (no period).
In the individual parts, each player should have only the part for his instrument(s). For example, there must be two individual parts for Flute 1 and Flute 2. Do not combine Flute 1 and 2 on a single part for both players to read.
These instructions seem to follow what I see in professionally-published scores, but I haven't attempted a broad review. In the examples I have, notes are written as though for a single voice (admittedly, this can only be done if the two combined parts have the same rhythm).
Trying to follow these instructions using MuseScore 2 appears to be a bit difficult. The best approach I have come up with is to give each instrument its own staff and include the part number in the part name and both the long and short instrument name (staff properties). When done composing, generate all the individual parts. Create a copy of the score, select the 2nd instrument, switch it to voice 2, copy/paste it into the first instrument's staff and delete the 2nd instrument. Then relabel the instrument as, say, "Flutes 1 & 2".
This gets you most of the way. To get to a fully professional orchestral score, voice 1 and 2 need to be combined in voice 1 (where rhythmically possible) and the score needs to be marked with "1.", "2." and "a2" when there is a single line of music. As far as I know, this needs to be done manually.
This might be a good use for the plugin system, but the plugin system appears incapable of adding chords (see https://musescore.org/en/node/67326). For a large score, the workaround I've described is tedious and requires keeping two scores in synch.
Does anyone have a better method?