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Chess Opening Theory/1. e4/1...Nf6/2. e5/2...Nd5/3. d4/3...b5/4. Bxb5/4...c5/5. dxc5

O'Sullivan Gambit
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 4. Bxb5 c5 5. dxc5

Alekhine Defense: O'Sullivan Gambit

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A mistake by White. 5...Qa5+ is now a very strong move, threatening the White bishop with check.

Theory table

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.

'1.e4 Nf6 2.e5 Nd5 3.d4 b5 4.Bxb5 c5 5.dxc5'

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
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:
Flank
Unorthodox