Other moves seen reasonably often include 3...Be7 (more than 12,000 examples) and 3...h6!? (more than 5,000 examples).
What I am covering in this series is yet another continuation, called the Semi-Italian Opening by Wikipedia, starting with 3...d6!?
The position can also be reached via the Philidor, ie 1.e4 e5 2.Nf3 d6 3.Bc4 Nc6.
The starting position of the Semi-Italian |
He writes: "This early favourite of Alexander Alekhine's prepares to exert pressure on the centre with ...Bg4 in connection with either ...Qe7 and ...g6 or ...Qf6 and ...0-0-0."
Here is Alekhine playing the line after he had become world champion.
Henri Grob - Alekhine
Zürich 19341.e4 e5 2.Nf3 Nc6 3.Bc4 d6!? 4.c3
Slightly more popular in Mega21 is 4.d4, but the text has also been played by grandmasters. For what it is worth, the analysis engines Stockfish12 and Komodo11.01 prefer the text.
4...Be6!?
The main move is 4...Bg4.
Soltis warns that "4...Nf6? walks into 5.Qb3 Qd7 6.Ng5." However this seems very good for Black after 6...Qg4, when White has problems defending the g2 and e4 pawns as well as his king's knight. However, 4...Nf6?! probably is bad, despite being the third-most popular move in Mega21, as White has 5.Ng5 d5 6.exd5, which is the same as a famous line in the Two Knights Defence except White has the extra move c3.
5.Bxe6 fxe6 6.Qb3 Qc8 7.Ng5 Nd8 8.d4 Nf6!?
This counterattack against e4 seems best.
9.dxe5 dxe5 10.0-0
10.Qb5+!? Nc6 11.Qc4 Nd8 12.f4 Bd6 13.0-0 was roughly equal, according to the engines, in Boris Kantsler (2491) - Yaacov Zilberman (2473), Israeli Team Championship 2003 (½–½, 23 moves).
10...h6 11.Nf3 Bd6 12.Nbd2 0-0 13.Qc2!?
The engines prefer the natural-looking 13.Nc4, although White is slightly better after the text too.
13...Nc6 14.b4 a6 15.a4 Qe8 16.Bb2 Ne7 17.Rad1 Ng6
Black's doubled central pawns look a liability, but they give him an extra half-open file and therefore kingside attacking chances.
18.g3 Qc6 19.Rfe1?
An extraordinary mistake for a top-class player to make. The engines give White a slight edge after 19.Ba3 or 19.Qb3!?
19...Bxb4 20.Kg2 Kh7 21.h3 Bd6 22.c4 Nd7 23.h4 b6 24.h5 Ne7 25.Re2 Qb7 26.Qc1 Nc6 27.Qa1 Rf7 28.Nh4 Ne7 29.Ndf3 Qc6 30.Nxe5 Nxe5 31.Bxe5 Qxc4 32.Rdd2 Bxe5 33.Qxe5 Nc6 34.Qa1 Rd8 35.Rc2 Qd4 36.Qc1?
White is still in the game, albeit a pawn down, after 36.Qxd4 Nxd4 37.Red2.
36...Ne5 37.Rxc7?
Better, according to the engines, is 37.Qb2 Qxb2 38.Rxb2, although Black is well on top.
37...Nd3
Grob must have missed this. It is fair to say this was not his day.
38.Qc3 Rxf2+ 39.Rxf2 Qxf2+ 40.Kh3 Qf1+ 41.Kh2 Qe2+ 42.Kg1
42.Kh3 Nf2+ leads to a quick mate.
42...Qf2+ 43.Kh1 Qxg3 0-1
To be continued
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