Lines with 3. Bg5
1. e4 e5
2. d4 Nf6
3. Bg5
After 3 dxe5, white's most popular response, evoking the Trompowsky, Torre, and Veresov attacks. However, the database record for this move (+3 -5 =5) is not particularly promising for white.
3... h6
Puts the question directly to white. 3... Be7 4. Nc3 exd4 5. Qxd4 Nc6 is roughly equal. However, several games in the database run 4 dxe5 Nxe4 5 Bxe7 Qxe7, after which black stands quite well. Moreover, the tempting 6 Qe2 in this line fails against the strong threats of 6...Qg5!
It should be noted here that black is almost on (heretofore) uncharted ground—I have only two games in my DB featuring 3…h6.
4. Bh4

The pin remains a useful device for white, if only to discourage an immediate …exd4.
4. dxe5 hxg5 5. exf6 Qxf6 and black’s aggressive posture more than compensates for the doubled pawn.
4. Be3 is possible, but not particularly enterprising. 4…exd4 5. Qxd4 Nc6 6. Qd3 d5 7. Nd2 Nb4 and white has several threats to parry. However, the gambit line 4…exd4 5. Bxd4 Nxe4 6. Qe2 Qe7 7. Nc3 Nc6 has white setting the tone.
Of course, 4. Bxf6 Qxf6 5. Nf3 Qb6 grants black a marked initiative.
4…exd4
This is not the simplest line; but for the tactically alert, it offers a good deal of canvas on which to paint. Those seeking calmer but equal play are encouraged to play 4…Be7, which may result in positions similar to those described under the notes for black’s third move.
5 e5
Seemingly white’s sharpest reply, but one which can be defused by proper play. The primary alternative, 5 Qxd4, allows black to equalize quickly with 5…Nc6. The gambit line 5…c3 may deserve some consideration.
5…Qe7
6. Qe2 d3!

The keymove. The pawn pressures white to move the c-pawn; once this is accomplished, black can get his queen out from under the pin and rescue the Nf6.
7. cxd3 Qb4+
White has little choice but to accede to black’s wishes. 7. Qxd3 Qxe5+ leaves black with no weaknesses and up a pawn.
8. Qd2
Perhaps white’s best route to equality. Other moves (Nc3, Nd2, and Kd1 are the only options) allow the black knight to flee to d5—a strong post. A caveat: in these three cases, 8…Qxh4 9. exf6 may lead black into trouble.
8…Qxh4
9. Nf3 Ne4!

Another surprise, but a sound one. A queenswap here will leave white underdeveloped and his advanced pawns open to attack. The very natural 10. dxe4 Qxe4+ gives black more than enough initiative (and the solid threat of …Bb4+) to offset the material loss.
Black appears to have the situation well in hand.


