Chopin Nocturne no.20

[klik11]

Do I need to play the second A in the seventh bar?
Some play it and others don't...

[amie_de_chopin]

It is not "tied", so you will have to play it.

[thinkgreenlovepiano]

Do I need to play the second A in the seventh bar?
Some play it and others don't...

It's because some editions have the two notes tied together, others like in the picture, don't.
 But I personally play it like how it's shown in your sheet music...
(PS: you are talking about the C (sharps) right? )

[klik11]

(PS: you are talking about the C (sharps) right? )

Yes

[thinkgreenlovepiano]

Yes

Ok so like I said, some editions tie the two notes together and others don't.

[quantum]

I've seen several places where various editions do not agree with each other in this piece.  In this case, I'd say play which ever variant sounds better to you.

I learned this piece by reading from several different editions, as I came across multiple questionable indications in the scores. 

[scott13]

Entirely down to personal interpretation. Personally i don't play it and use slight rall. on that section to slightly accent the B. Even though this is not what i have written in my edition, i prefer the sound it gives, so just try both and see which you like.

[oxy60]

I feel that C# needs to struck again to get the sound of it together with the low C#. If it isn't struck then the low C# sounds by itself and changes the character of the measure.