technical question on moonlight sonata 1st movement

[mattm]

so i've begun to try and learn the first movement and i'm curious as to the notes in bar 6.  The triplets in the left hand, the score says to sharp the b's, which would make them c's, but then the key signature indicates to sharp all c's.  so do i play c (b#) or c#?  thanks.

[llamaman]

Hmm...I do not think that the B# would become C#. If Beethoven had wanted that, a double sharp would probably have been used, or a C. The note that is sharpened (B) is still B, and therefore would not be sharpened again to a C#.

[xvimbi]

Generally, you just sharp the B and play B# (i.e. C), not C# (which would be B##). Otherwise, it would not be possible at all to play a C(natural) in a piece that has the C's sharped according to the key signature, because any C would be automatically sharped

By the way, it is best to think of a B# as a B#, not as a C (likewise in other situations where enharmonics come into play).

[mattm]

Thanks for the replies.   .  It's clear now.

[6ft 4]

the triplets aren't in the left hand?!?

[mattm]

the score i am using has triplets in the left hand from measures 6 - 22.  Apparently the version I am working with is a somewhat condensed version and is only 2 pages long.