Those Jenssen articles were mediocre at best, everybody mentioning Gallagher-Arlandi, Grasso-Pampa, etc... Well, the truth can be seen by the fact that Gallagher no longer plays the KG but the Tromp! As for new, independant analysys... I have not seen much here

I really don't get the point of 3.Nh3.   ???

The best reply to Quaade's 4.Nc3 is Nc6 as the Pierce Gambit is close to refutation.

On IECC a few weeks back I finished three thematic KG events against a 2000+ player, in lines considered "dubious" these days. The lines were the Quaade Gambit 1.e4 e5 2.f4 exf4 3.Nf3 g5 (4.Nc3 g4 5.Ne5), Rosentreter Gambit (4.d4 g4 5.Bxf4) and Allgaier Gambit (4.h4 g4 5.Ng5 h6 6.Nxf7). While, obviously, I am not perfect and therefore the statistics wont reflect the standing of the openings, this is what happened:

In the Quaade, I won with white and drew with black.
In the Rosentreter I lost with white and won with black.
In the Allgaier I drew with both white and black.

The Quaade gambit has been neglected for many years, but the new move that both myself and my opponent used, after 5...Qh4+ 6.g3 fxg3 7.Qxg4 Qxg4 8.Nxg4 d5, 9.Ne3!, seems to offer white good chances. 

The Rosentreter has always been considered, on the other hand, almost respectable, yet as white I got nowhere after 5...gxf3 6.Qxf3 Nc6 7.Bc4 Qh4+ 8.g3 Nxd4 9.Qd3 Qf6 10.Nc3 Ne7 11.O-O-O c5 12.e5 Qg6 13.Ne4 Nec6 14.c3 Ne6 15.Nf6+ Kd8, even though my initial feeling was that white should be okay here. My opponent tried instead 7.c3 and got even less play. Furthermore, in my only OTB encounter with this opening (on the black side, even though I play the KG myself), I played 6...d5 without knowing what I was doing and still managed to survive the onslaught.

The Allgaier has recently had hope given up on it. Harding wrote it off in his kibitzer articles on it, and Gallagher said he had been unable to rescue the line in WWTKG. I played (as white), what Harding claimed was the last hope for the line, and managed to draw fairly comfortably, in the endgame white may even have been slightly better. On the other hand, black played into the old line 7.d4 f3 8.Bc4+ d5 9.Bxd5+ Kg7 10.gf Nf6 11.Nc3 Bb4, which Gallagher assesses as -/+, yet as black I had to find some accurate moves just to survive the middlegame, and then found myself in a drawn K, R, N + 3 against K, R + 4 endgame.

What is the moral of all this? I'm not sure... however, the Quaade gambit is certainly worth a shot, as the number of people who will play into the trap after 5...Qh4+ 6.g3 fxg3 7.Qxg4 with 7...g2+?? 8.Qxh4 gxh1=Q 9.Qh5! +- is astounding in my experience, and white still gets good chances after 7...Qxg4 8.Nxg4. The Rosentreter should be more dangerous, yet I found it very hard to get anything going with it in correspondence.

Regards, 
Craig

I find it intersting to explore unusual variations.  But if you're looking for something for your opening repertoire then 1.e4 e5 2.f4 gxf4 3.Nh3 is very hard to recommend.  I'd say after 3...Qh4+ 4.Nf2 Nc6 White is struggling for equality and not likely to reach it.

Quote:

http://ccn.correspondencechess.com/

(then click on CCN Archive)

Ask Johansson himself - you can find his email adress on his site and in his book.

3.Nh3? must be stupid move. Developing with Nf6! emmidiatelly should only be one off many refutation. 

It's pity the debate is on such low level, when so many intresting variations can be found in the mainlines