Ruy Lopez, Schliemann Defence Acc.

	a	b	c	d	e	f	g	h
8									8
7									7
6									6
5									5
4									4
3									3
2									2
1									1
	a	b	c	d	e	f	g	h

This move is alright, but gives Black a slight edge, as they will regain the lost pawn with extra tempi and space after 4... e4.

White's main move is then 5. Qe2, pinning and attacking the e4 pawn. 5... Qe7 is best for Black, avoiding the pin and renewing the threat on the knight on f3. Now White can try 6. Bxc6 with the idea of moving the knight to d4 to protect f5. If 6... dxc6, 7. Nd4 can be followed by Ne6 in some lines, such as after 7... Qe5. After 6... bxc6 7.Nd4, Black will likely play 7... Nf6, and eventually either Qe5 or c5 and then d5 to try to win the pawn back.

If 5. Bxc6, Black will play 5... dxc6 and Bxf5 with a White can also try 5. Ng1, threatening Qh5+, and Black will likely respond 5... Qg5.