(1) Donnelly,M.J - Brown,R.E [C35]
Training game with clocks, Billingham , 1981

1.e4 e5 2.f4 exf4 3.Nf3 Be7 4.Bc4 Bh4+
Forcing White to displace his king or enter the obscure complications of the sacrificial 5. g3.

5.Kf1 g5
Unusual in this exact position but the game transpose to several others where this move is played later in the opening by Black. [5...d5 is a more usual response when one suggestion by KG expert Thomas Johansson is 6.exd5 (Instead an old "classic" game went 6.Bxd5 Nf6 7.Nc3 (7.Bb3 tends to be prefered in more recent games whilst GM Shaw suggests the interesting 7.Nxh4!?) 7...0-0 8.Nxh4 Nxd5 9.Nxd5 Qxh4 10.Nxc7 Nc6 11.Nxa8 Nd4 12.d3 f3 13.g3 Qh3+ 14.Kf2 Qg2+ 15.Ke3 Nxc2+ 16.Kf4 f5 17.e5 h6 18.h4 g5+ 19.hxg5 hxg5+ 20.Kxg5 Qxg3+ 21.Kh5 Qg4+ 22.Kh6 Kf7 0:1, G.A.MacDonnell-Bird, England 1870.) 6...Bg4 7.d3! ]

6.d4 d6 7.Nc3
This seems a new move in practical play, which keeps options open, and develops rapidly. Surprisingly the move has been extensively analysed in recent years, with various computer programmes as published in the ChessBase web site, which indicate this move is White's best option. [Practical experience has almost exclusively focussed on damaging Black's pawn structure and obtaining the two bishop with 7.Nxh4 gxh4 when White can continue, in a rather randomised position, with 8.Qh5 (and also 8.Bxf4 Nc6 (8...Qf6 9.Qf3 (9.Qd2 Ne7 (9...Nc6 10.c3 1/2:1/2 John-Vinnichenko, ICCF-Cup V208 1990.) 10.Kg1 Ng6 11.Bg5 Qg7 James-Hayes, Troy MI Classic 1993.) 9...h5 Cabral Mesquita-Da Macedo,Natal Potiguar open 2009. (9...Nc6 10.c3 Bd7 11.Na3 0-0-0 Scmitt-Meinhardt, Milwaukee North Central open 1971.) ) 9.c3 Qe7 10.Nd2 Qf6 11.Qf3 Quiring-Trepanier, Edmonton CC March open 2004.) 8...Qf6 9.Nc3 Ne7 10.e5 dxe5 11.dxe5 Qf5 12.Qxh4 (12.Qxf5 Bxf5 13.Nb5 Na6 14.Bxf4 Spieker-Michalowski, NRW-tch U18 Germany 1992.) 12...Ng6 13.Qh6 f3 Boe-Fredriksen, Fredrikstad Hostturnering 2002.; Instead 7.Bb5+ didn't achieve much after 7...c6 8.Be2 Qf6 9.Nxh4 gxh4 10.h3 Perl-Green, ENG-ISR corr 1992.]

[Some of the problems Black faces are illustrated by what can happen if the natural move 7...Bg4 is played. White has the tactical shot 8.g3 fxg3 9.hxg3 Bxg3 (9...Qf6 10.Kg2 Qxf3+ 11.Qxf3 Bxf3+ 12.Kxf3 ) 10.Rg1 in each case winning a piece, which still occurs after 10...Bxf3 11.Qxf3 attacking g3 and f7.]

Whilst promising, gaining a tempo and retaining the option of Bb5, this move is not the best. White still has the tactical shot g3 available here, albeit a little more complex than in the last note. For instance [8.Bxe6 fxe6 9.g3 fxg3 10.hxg3 Bxg3 (10...Qf6 11.Kg2 (Certainly not 11.gxh4 as Black wriggles out with 11...g4 ) 11...Ne7 and White's king is safe enough so the piece can be taken with 12.gxh4 gxh4 13.Rxh4 ) 11.Bxg5 Qd7 12.Ne2 again winning the bishop.]

8...Bg4 9.Qd3
[9.Qd4 is somewhat stronger since by later fixing the h4 pawn, with gain of tempo, White can eventually win it 9...Qf6 10.Qxf6 Nxf6 11.Nxh4 gxh4 12.h3 (12.Bxf4 is poor as Black is fine after 12...h3 ) 12...Bh5 13.Bxf4 Bg6 14.Bb5+ Nbd7 15.Bg5 0-0 16.Bxh4 a6 17.Bd3 Rae8 18.Re1 and by securing the e4 pawn White remains a pawn up.]

This is OK and just slightly better for White. A clearer option for Black was, however, [9...Bxf3 10.Qxf3 Nd7 threatening Ne5 when White is unable to exploit the isolated Bh4.]

10.Nxh4 gxh4 11.Bxf4 Qf6
[11...Ne7 with the idea of Ng6 is another way for Black to obtain a playable game.]

12.g3 Ne5
[12...Ne7 is again safer as Black after 12...Ne5 not able to exploit the weak white squares on h3 and especially f3.]

[13.Bb5+! keeps a small edge as all Black's king moves may be answered by Qe3.]

Trying to push the White king around but unfortunately Black finds its remarkably safe wandering around in the centre of the board. [13...Ne7 developing is once again a steadier option.]

14.Ke2 Nxc4?!
Now White is significantly better. Black could have generated a little more play, but not an advantage, with [14...Bg2 15.Rhe1 (15.Rhg1 h3 is level.) 15...Nf3 16.Bb5+ Kf8 17.Qf2 h3 is also level. But not grabbing material with (17...Nxe1 18.Rxe1 h3 (18...Bh3 19.Kd2 and White has a winning lead in development and threatens gxh4 as well as e5.) 19.Kd2 with advantage.) ; 14...a6 preventing White accessing b5 is also a better line for Black than Nxc4 and keeps White's edge under some degree of control.]

15.Qxc4 Bg4+ 16.Ke3 0-0-0
Another case of castling into a strong attack. White is able to get at the Black king but Black is unable to attack the White king. [16...Ne7 holds out a bit more hope but not much since White has 17.Raf1 (17.Qxc7 Rc8 18.Qa5 0-0 wins a pawn but is less clear as the Black king is now a lot safer.) 17...Bh3 18.Rf2 and Black, who has no decent moves and is unable to defend c7. h4 or prevent e5 is lost. The White king can quietly drift to d2 and c1 in complete safety if required.]

17.Nb5 Rd7
[Despite pressuring e4 17...Qe7 doesnt defend due to 18.h3 (or simply 18.Nxa7+ Kb8 19.Nb5 f5 20.Kd2 fxe4 (20...Qxe4 21.Qxc7+ Ka8 22.Qxd8# ) 21.Rae1+- ) 18...Bh5 (18...a6 19.Nxc7 Qxc7 20.Qxc7+ Kxc7 21.hxg4 hxg3 22.Bxg3+- as White can play Raf1 or e5.) 19.Nxa7+ Kb8 20.Nc6+ bxc6 21.dxc6+- ]

[White has several ways to win and 18.h3 is another very strong option.]

[18...a6 19.Na7+ (19.Nxd6+ is premature as White is only a little better after 19...Rxd6 20.Bxd6 Qxd6 21.Qd4 Qh6+ ) 19...Kb8 20.Nc6+ Ka8 21.gxh4 Qxh4 22.Qd4 wins for if 22...Nf6 23.Qa7# ]

19.Nxa7+ Kb8
[If 19...Kd8 20.Qd4 is again winning, for example, 20...Nf6 21.Bg5+- ]

20.Nc6+ bxc6 21.dxc6
[After 21.dxc6 White mates in a few moves and can even ignore the rook on d7: 21...Kc8 (21...Nf6 22.Qb5+ Kc8 23.Qb7+ Kd8 24.Qb8# ; 21...Ka8 22.Qa6+ Kb8 23.Qb7# ) 22.Qa6+ Kd8 23.Qa8# ] 1-0