Shulman
Abrahams-Noteboom Variation

scherbakovs books is far and away the best. ICC has a series on the noteboom and one on the marshalla as well, though theyre not all too useful imo.

Who did these videos? Ronen? I found the Marshall Gambit one, but not the Noteboom. I agree that they are less useful, but they still are game analysis and ideas moreso than scherbakov's extremely excellent theory.
Kramnik is expert on this. If you want to know the variation better, watch video by the late Mark Diesen ; how to win against 1.d4 using Noteboom variation. It is 4 videos lecture in chessletures.com

Who did these videos? Ronen? I found the Marshall Gambit one, but not the Noteboom. I agree that they are less useful, but they still are game analysis and ideas moreso than scherbakov's extremely excellent theory.
the noteboom is in 'gambit guide'. Which is a bit odd, considering neither side gambits in the mainlines.

Well, for some time, black is up a pawn. Sometimes, if white doesn't play the big main line, black will have a pawn.

I'm surprised not as many top players play it as they probably should. The stats are great, with black winning more in the actual noteboom in chess.com's game explorer.

It scores well at low master level.
The main problem with it is many top plyers won't allow it, they will likely play the marshall gambit, which is the real test of the triangle. OR they will simply avoid it with something like Qc2.
Of course even if they do enter the mainlines, white still has an advantage despite the statistics, and he has the attack. Most top players would probably not want to risk so much with black.

True, but as the Hammer-Naka game showed, those passed pawns can be really effective if black knows what he's doing.
As far as the marshall goes, it is quite interesting. It's probably equal in the end as most legit gambits are, but black has other options like 4...Bb4!? (Not taking the pawn)

Probably, but to be equal you first have to pass through 20 moves of super accurate play in which youre the one who will be crushed for a mistake. Also in relatively unexplorered territory where white could have nasty surprises.
If i start having the marshall played against me OTB id probs drop the triangle, white simply gets all the fun.

Yea, it's somewhat more positional than most gambits, with white usually relying on his dark squared bishop as compensation. It can get very tactical of course though.
Any good sources for this variation? I have the Triangle System Book by Scherbakov, but who's a good player who relies on this opening a lot? Here's a super recent game which impressed me personally: