Two notes at once...?

[doverbay]

Is it kosher to play two notes at once with the thumb?

For example in bar 6 of Traumerei.  With the right hand.
I can't think of another way to reach that.
I have looked at youtube and people seem to reaching it quite easy, so they must
be rolling the D A E just playing the other three notes via the thumb?  I can just
BARELY reach an octave with my 2nd to 5th fingers on my right hand... so I'm
gonna just have to do that.... with the thumb.

 

[nystul]

Yes, play them both with the thumb.

[j_menz]

Is it kosher to play two notes at once with the thumb?

Kosher, and sometimes essential.