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Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bb5/3...a6/4. Ba4/4...Nf6/5. O-O/5...Be7/6. Re1

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Position in Forsyth-Edwards Notation (FEN)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1
ECO code: C79
Parent: Morphy defence
Responses:

6. Re1

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Now the White's own e-pawn is defended, the threat Bxc6 & Nxe5 winning e5 becomes a serious problem for Black.

The main move, 6...b5, permanently cuts out any of that nonsense. Black usually follows with castling and playing ...d6, freeing their c6 knight from having to guard e5 and allowing their bishop to develop.

There's also 6...d6, the Averbakh variation. It looks like Black has just forgotten which order to play the moves in. In this line White can play 7. c3 before their bishop is kicked, so when ...b5 eventually comes the bishop can retreat to c2 in one move. White normally wants their bishop on c2, and this way they have saved a tempo compared to 6...b5 7. Bb3 followed by c3 and Bc2 later.

The advantage for Black is that after 7.c3 Black has time to play ...Bg4 before White has gotten in h3. Whenever a bishop appears on g4 in the Closed Ruy Lopez, White is going to have to play d3 and bring the queen's knight across to the kingside to drive the bishop away before considering d4. On the other other hand, Magnus Carlsen voluntarily plays d3 instead of d4 even without a bishop on g4, so the current verdict seems to be that 6...d6 loses a tempo for no reason.

Theory table

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.

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6.Re1

6 7 8 9
Re1
b5
Bb3
d6
c3
O-O
h3
Bb7
...
d6
c3
Bg4
d3
Nd7
Be3
h6
=
...
O-O

References

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See also

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  • Nunn's Chess Openings. 1999. John Nunn (Editor), Graham Burgess, John Emms, Joe Gallagher. ISBN 1-8574-4221-0.


v · t · e
Chess Opening Theory
1. e4 e5
Open games
3. Bb5
Spanish
3. Bc4
Italian
3. Nc3
Three knights
Other
2...Nf6
Russian
2...d6
Philidor
Other
2. f4
King's gambit
2. Nc3
Vienna
Other
1. e4 c5
Sicilian
1. e4 e6
French
1. e4 c6
Caro-Kann
1. e4 other
1. d4 d5
Closed games
1. d4 Nf6
Indian
1. d4 f5
Dutch
1. d4 ...other:
1. Nf3
Zukertort
Flank
Unorthodox