Ironically, or perhaps not, I can now access the 2022 version of ChessBase's Mega database through ChessBase 9, which I will use for the foreseeable future rather than ChessBase 16, which at least for now I regard as much less user-friendly.
Spanton (1804) - Miroslav Macho (1653)
Hradec Králové Round Six
Vienna Game
1.e4 Nf6 2.Nc3 e5 3.f4 d5 4.fxe5 Nxe4 5.Nf3 Be7 6.d3
The main line in Mega22 runs 6.Qe2 Nxc3 7.dxc3, which the analysis engines Stockfish14.1 and Komodo12.1.1 reckon very slightly favours Black.
6...Bh4+!?
A very rare continuation, which is quite liked by the engines, although they prefer the normal 6...Nxc3.
7.g3
Not 7.Nxh4?? Qxh4 8.g3 Nxg3.
7...Nxc3 8.Nxc3 Be7 9.Bg2
 |
| White has gained two tempi (g3 and Bg2) compared with the normal line starting with 6...Nxc3, but the engines reckon White has at best equality |
This is presumably meant to weaken the white king's position, but the coming exchange is of doubtful value as the black light-square bishop is more active than its white counterpart.
15.Bg5 Bxg5 16.Qxg5
Good enough for an advantage, but the engines prefer 26.Nxg5!?
16...Bxg2?! 17.Kxg2 Na6 18.Nh4 Nc7 19.Nf5 Ne6 20.Qg4 Qe8 21.Nd6!?
This is a strong outpost for the knight, but the engines reckon the knight is even better off staying on f5, so they prefer 21.Rf3 or 21.h4.
21...Qe7 22.Rf5?!
Much better, according to the engines, is 22.Nf5.
22...f6 23.Rh5?
This lets Black equalise. Correct is building up with 23.Rbf1.
23...fxe5 24.Nf5 Qd7
 |
| How should Black proceed? |
*****
*****
*****
*****
25.Nxg7??
Losing instantly. There were several ways to maintain equality, including 25.Nh6+ Kh8 26.Rxe5.
25...Nf4+ 0-1
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