411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nf6/3. Nxe5/3...d6/4. Nxf7/4...Kxf7/5. d4
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Petrov's Defence: Cochrane Gambit rd nd bd qd bd rd pd pd pd kd pd pd pd nd pl pl pl pl pl pl pl pl rl nl bl ql kl bl rl
Petrov's Defence: Cochrane Gambit
Black's priority is to organize his defence and to counter White's attack. Therefore, /5...Nxe4/ is bad (moreover, White can win the knight with 6. Qh5+ g6 7. Qd5+).
There are three strategies to build comfortably the defence:
/5...c5/ tries to regain space by attacking the center from the queen side.
/5...Be7/ is a first step toward an "artificial castling". This prepares Re8 and Kg8.
/5...g6/ prepares a fianchetto. Black will leave the e file open and builds another kind of defence with the bishop on g7. But we may wonder if this will resist a White pawn advance on the king side.
Theory table
.
1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. d4
5
...c5
=
...Be7
=
...g6
=
...Nxe4
+/-
References
Petrov Defence