In Furhoff-Sandor/Budapest 1994, White’s loss is probably not due to the opening: 6.g3 g4 7.Nh4 Nc6 8.Bb5 f3 9.d5 a6 10.Ba4 b5 11.Nxb5 axb5 12.Bxb5 Nge7 13.dxc6 o-o 14.o-o Be6 (so far the game) and 15.a4 Qb8 16.h3 is unclear to me.
It seems that White plays an improved version of the Hanstein Gambit, as he has no problems developing his queenside.
Like Jensen I think this variation is appealing, as White also can avoid the Fischer Defense Main Line with 3...d6 4.d4 g5 5.Nc3 etc.
Is the conclusion justified, that c4 is not a good square for the bishop in the g5 lines?

Quote:


To me 10.Nxg6 looks wrong. Instead 10.Nf5 seems to fit in better with a King's Gambit. I've tried this a couple of times in blitz games and it's worked reasonably well. The critical line must be 10...Bxf5 11.exf5 Ne7 and now 12.Bg5 f6 13.Bf4 Nxf5 14.O-O-O looks to give White pretty good compensation in a rather murky position.

Wow this discussion is fast!

In the Rosentreter line I definitely think 6...Nc6 is the best move.
As for the second line it has three fathers:
1) 1.e4 e5 2.f4 ef4 3.Nf3 g5 4.d4 (Rosentreter) 4...Bg7 5.Nc3 d6 6.g3
2) 1.e4 e5 2.f4 ef4 3.Nf3 g5 4.Nc3 (Quaade) Bg7 5.d4 d6 6.g3
3) 1.e4 e5 2.f4 ef4 3.Nf3 d6 (Fischer) 4.d4 (or 4.Nc3 g5 5.d4) g5 5.Nc3 Bg7 6.g3

Similar positions arise in the Becker defence after say: 1.e4 e5 2.f4 ef4 3.Nf3 h6 4.d4 g5 5.Nc3 Bg7 6.g3 or 5...d6 6.g3.

I also have Estrin and Glazkovs 1988 Russian edition as well as the two-volume 1982 english translation. The 1982 edition gives 4.Nc3 Bg7! 5.d4 d6 6.g3 g4 7.Nh4 f3 8.Bf4 Bf6 9.Nf5 Bxf5 10.exf5 Ne7! 11.Bd3 Nc6 with advantage to Black.
The 1988 edition gives 4.Nc3 Bg7 5.d4 d6 6.g3 Nc6! I cannot read much russian but the commentary after 16...Rh5 says "Black secures his advantage".
I have found another game with this continuation:

Mason,D (2295) - Kennaugh,C (2280) [C37]
4NCL Birmingham ENG, 1999

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 Bg7 5.Nc3 d6 6.g3 Nc6 7.d5 Ne5 8.gxf4 gxf4 9.Bxf4 Bg4 10.Bb5+ Kf8 11.Bxe5 Bxe5 12.0-0 Nf6 13.Qd2 Rg8 14.Qh6+ Ke7 15.Kh1 Rg6 16.Qh4 Bxf3+ 17.Rxf3 Qg8 18.Raf1 Rg4 19.Qf2 Qg6 20.Rf5 Rg8 21.Rxe5+ dxe5 22.Qc5+ Kd8 23.d6 cxd6 24.Rd1 Nxe4 25.Qxa7 Nxc3 0-1

However, I have recently had this line with White (from the Fischer defence move-order) and did not like 7.d5 Ne5. Nor did 7.Bc4 g4 or 7.gxf4 g4 look appealing so I chose the only other option. Here is the game with light annotations:

Jensen,M - Edoo,N [C34]
Brønshøj Ch Copenhagen (3), 29.04.2004
1.e4 e5 2.f4 exf4 3.Nf3 d6 4.d4 g5 5.Nc3 Bg7 6.g3 Nc6 7.Bb5 Actually I had my reservations about this move too since White has not had good results with this move in the main line and the bishop might prefer to go to d3.
7...a6 [7...g4 8.Nh4 f3 transposes to the main line, where White has lost the two games I have: Notkin,M-Kazhgaleyev,M/playchess.com 2004 and Furhoff-Sandor/Budapest 1994.]
8.Bxc6+ bxc6 9.0-0 What else?
9...g4 10.Nh4 f3 White has been prevented from castling queenside and there is no bishop on c4 to fear. 11.Be3 Ne7 12.Qd2 Ng6 13.Nf5 Bf6 14.Rae1 Rg8 15.Bh6 Ne7 16.Nxe7 Bxe7 17.d5! Now White crashes through c5 18.e5!± Bf5 19.exd6 cxd6 20.Rxe7+!? [20.Qf4! was a lot safer but as always I went for the most spectacular finish] 20...Kxe7 [20...Qxe7 21.Re1 Be6 22.dxe6 fxe6 23.Nd5+-] 21.Qf4 Qd7 22.Bg5+?? [Oh no I accidentally switched the moves 22.Re1+ Kd8 and now 23.Bg5+ Kc7 24.Re7+- wins the queen] 22...f6 23.Re1+ Kf7-+ and Black won in a few moves. What a depressing game.
Still I had a good feeling during the game. White has a clear plan of opening up the centre, while Black has problems finding a safe place for the king.

But still the problem of 4...g4 and 6...Nc6 remains.
Kennaugh suggests 7.Bc4 d5 8.Bxd5 Nxd4 9.Qd3!? Bg7 10.0-0 Be6 11.Nc3 c6 12.Qg3 Qb6 13.Kh1 Bf6 14.Be5! with good play. But there is also 12...Qf6 and 10...Ne6 to deal with, e.g. 11.Qg3 Bd4+ 12.Kh1 Nxf4.

Michael.

Just a warning for Black, how quick things can go
wrong:

MNb - Koller,G [C37]
ICCF EM/H/135, 2004

1.e4 e5 2.f4 exf4 3.Pf3 g5 4.d4 d6 5.Pc3 g4 6.Lxf4 gxf3 7.Dxf3 Lg7 8.0-0-0 De7 9.e5 dxe5 10.dxe5 Pc6 11.Pd5 Dd8 12.e6 1-0.

Of course this game has no importance for theory,
except maybe concerning the move order.

Hmmm, hope I'm not too late on this discussion.

White seems fine in most of the other lines, but I play this myself as white (and defend it as black) and 6...Nc6 seems like a better try for black. I personaly play the 6...d5 or 6...Nc6 lines and have never lost in them OTB... I'm currently playing an IECC correspondence game either side of the position after 6...Nc6, I cannot post yet as they are ongoing, but as soon as I can I will post the games for post-mortem destruction by the stronger players here

Regards, 
Craig 

In the variation 1.e4 e5 2.f4 exf4 3.Nf3 g5 4.d4 g4 5.Bxf4 gxf3 6.Qxf3 d5 7.Nc3 Bb4 I believe 8.Bb5+ may actually be White's best option, meeting ...c6 or ...Bd7 with a quick O-O.  My fritz aided analysis suggests that this results in a complicated equality.

A) 6...d5 7.Be5!  (most authors only give the inferior 7.exd5 or 7.Nc3) 7...f6 (7...dxe4 8.Qxe4 Qe7? 9.Nc3! f6 10.Nd5 wins for White - Emms) 8.Qh5+ Ke7 (8...Kd7 9.Qf7+) 9.Nc3 with great play for the piece, as in Coco-Tuisko, corr 1995.

Personally I don't like this line as after 9...Be6 10.exd5 Bf7 I think it's difficult for White to justify the sacrifice. After 11.Qh4 Ke8 12.Bf4 Bd6, say, Black can develop freely. While his king will remain in the centre for a while it's difficult to get at, and of course Black still has an extra piece.

I think that 7.Nc3 is better, and after Bb4 8.exd5 looks like reasonable compensation.

Ben Hague

Dear Paul

I haven't played the King's Gambit for twenty years if a day, but  I very much enjoyed your discussion of the Rosentreter Gambit (which I used to play). ChessPublishing analysis at its best! Keep it up!

All best,
Michael