Possibly? I missed that part, well I skimmed over it because it already happened, and jumped into the web version 
Definitely possible. I guess I’m somewhat conditioned when thinking of joseki to think of black has these stones, white has these and not so much “a stone is here”. I guess not hinting with the colours is a little bit more like
Although trying todays one I’m more confused. I’ll keep guessing but I’ll post some here that I just don’t understand. Maybes it’s the mirrors and rotations kicking in?
Spoiler but nowhere near the answer
- Guess one
too few moves
- Guess two
too few moves
- Guess three
too few moves
So from going from guess one to two, I expect there to be a black 3-4 point and kosumi but not the first and third moves. It definitely feels like they need to be black stones from the further guess. But I can’t see a way to use that information to figure out anything further to guess.
I might need more practice and to think a bit more. I’ll try more guesses. It’s gonna be a bad score today