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Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. Ng5/4...d5/5. exd5/5...b5

Ulvestad Variation
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)

r1bqkb1r/p1p2ppp/2n2n2/1p1Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w

Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5

Ulvestad Variation

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5 ... b5.

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The defining move for the Ulvestad Variation. Black challenges the strong bishop on c4 by offering a pawn.

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 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 b5

Ulvestad Variation

6 7 8 9 10
Bf1
Nd4		 c3
Nxd5		 Ne4
Qh4		 Ng3
Bg4		 f3
e4		 ∞
Bxb5
Qxd5		 Nc3
Qxg2		 Qf3
Qxf3		 Nxf3
Bd7		 O-O
Bd6		 =
dxc6
bxc4		 Qe2
Qd5		 f4
Qxc6		 fxe5
Bg4		 Nf3
O-O-O		 =

Estimated next move likelihood

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Bf1 62%, Bxb5 28%, dxc6 6%, Bb3 2%, Qe2 1%

When contributing to this Wikibook, please follow the Conventions for organization.

References

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Wikipedia has related information at Two Knights Defence

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



v · t · e
Chess openings quick reference
1. e4
1...e5 · Open
2. Nf3
With 2...Nc6:

With other 2nd moves:
2. Other

1...c5 · Sicilian
2... Nf3 · Open Sicilian
With 2...Nc6:

With 2...d6:

With 2...e6:

With other 2nd moves:
Anti-Sicilians
1... other
Caro-Kann
French
Other


1. d4
1...d5 · Closed
2. c4
2. Nc3
2. other
1...Nf6 · Indian
2. c4
With 2...e6:

With 2...g6:

With other 2nd moves for Black:
2. Nf3
2. other
1... other
Flank
Unorthodox
出典: Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. Ng5/4...d5/5. exd5/5...b5

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