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Chess Opening Theory/1. e4/1...Nf6/2. e5/2...Nd5/3. d4/3...b5

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

Position in Forsyth-Edwards Notation (FEN)
Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 b5

Alekhine Defense: O'Sullivan Gambit

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Black sacrifices their pawn to bring White's bishop to a vulnerable square. White's strongest move is to accept the gambit, although it can be ignored with a developing move like 4. Nf3 or 4. c4.

Theory table

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.

'1.e4 Nf6 2.e5 Nd5 3.d4 b5'

3
...
d6
=

'1.e4 Nf6 2.e5 Nd5 3.d4'

3
...
e6
=

References

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v · t · e
Chess Opening Theory
1. e4 e5
Open games
3. Bb5
Spanish
3. Bc4
Italian
3. Nc3 Nf6
Four 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:
Flank
Unorthodox