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Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nf6/3. Nxe5/3...d6/4. Nxf7/4...Kxf7/5. d4

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< Chess Opening Theory‎ | 1. e4‎ | 1...e5‎ | 2. Nf3‎ | 2...Nf6‎ | 3. Nxe5‎ | 3...d6‎ | 4. Nxf7‎ | 4...Kxf7
Petrov's Defence: Cochrane Gambit
a b c d e f g h
8a8 black rookb8 black knightc8 black bishopd8 black queene8 black kingf8 black bishopg8 black kingh8 black rook8
7a7 black pawnb7 black pawnc7 black pawnd7 black kinge7 black kingf7 black kingg7 black pawnh7 black pawn7
6a6 black kingb6 black kingc6 black kingd6 black pawne6 black kingf6 black knightg6 black kingh6 black king6
5a5 black kingb5 black kingc5 black kingd5 black kinge5 black kingf5 black kingg5 black kingh5 black king5
4a4 black kingb4 black kingc4 black kingd4 white pawne4 white pawnf4 black kingg4 black kingh4 black king4
3a3 black kingb3 black kingc3 black kingd3 black kinge3 black kingf3 black kingg3 black kingh3 black king3
2a2 white pawnb2 white pawnc2 white pawnd2 black kinge2 black kingf2 white pawng2 white pawnh2 white pawn2
1a1 white rookb1 white knightc1 white bishopd1 white queene1 white kingf1 white bishopg1 black kingh1 white rook1
a b c d e f g h
Position in Forsyth-Edwards Notation (FEN)

rnbq1b1r/ppp2kpp/3p1n2/8/3PP3/8/PPP2PPP/RNBQKB1R b

Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. d4

Petrov's Defence: Cochrane Gambit

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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

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For explanation of theory tables, see theory table and for notation, see algebraic notation..

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. d4

5
...
c5		 =
...
Be7		 =
...
g6		 =
...
Nxe4		 +/-

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References

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Wikipedia has related information at Petrov Defence

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