Chess Opening Theory/1. d4/1...d5/2. c4/2...e6/3. Nc3/3...Nf6/4. Nf3/4...Bb4

Ragozin 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) rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N2N2/PP2PPPP/R1BQKB1R
	Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4
	ECO code: D38
	Parent: Queens Gambit declined

4...Bb4 · Ragozin Defence

The mainlines continues either

5. Bg5 h6 (Moscow variation)
5. Bg5 dxc4 (Vienna variation)

Theory table

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4

	5
Moscow variation	Bg5 h6	=
Vienna variation	Bg5 dxc4	=
Alekhine variation	Qa4+ Nc6	=

v · t · e

Chess Opening Theory

1. e4 e5
Open games

2. Nf3

2...Nc6

3. Bb5
Spanish

Berlin →
- Anti-Berlin
- Beverwijk
- L'Hermet → Berlin Wall

Morphy →
- Exchange
- Closed → Marshall
- Open
- Arkhangelsk
- Anderssen
- Mackenzie

3. Bc4
Italian

Giuoco Piano →
- Evans gambit
- Giuoco pianissimo
- Rosentreter
- Jerome ??

Two knights defence →
- Open
- Knight attack →
  - Fried liver
  - Polerio

Anti-fried liver ?!
Blackburne shilling ?

3. Nc3
Three knights

Four knights
- Glek
- Italian
- Scotch → Belgrade
- Spanish
- Naroditsky !?
- Halloween ?!
Steinitz
Schlechter

Other

2...Nf6
Russian

2...d6
Philidor

Other

2. f4
King's gambit

2...exf4
Accepted

King's knight →
- Kieseritzky
- Schallop
- Modern
- Fischer
- Lolli ?
- Muzio ?
Bishop's →
- Cozio

Other
Declined

2. Nc3
Vienna

Falkbeer →
Max Lange

Other

1. e4 c5
Sicilian

2. Nf3

2...Nc6 3. d4 cxd4 4. Nxd4

2...Nc6 other

2...d6 3. d4 cxd4 4. Nxd4

Dragon →
- Levenfish attack
- Yugoslav attack
Dragondorf
Kupreichik
Najdorf →
Scheveningen

2...d6 other

2...e6 3. d4 cxd4 4. Nxd4

French, Normal
Kan
Kveinis
Paulsen-Basman
Taimanov →
- Bastrikov →
  English attack
- Szén →
  Garry Gambit

2...e6 other

Others

Anti-Sicilians

1. e4 e6
French

1. e4 c6
Caro-Kann

1. e4 other

Barnes ?
Borg ?
Corn stalk ??
Duras ??
1...b5 ??

1. d4 d5
Closed games

2. c4
Queen's gambit

2. Nc3

2. other

1. d4 Nf6
Indian

2. c4 e6

2. c4 g6

King's Indian →
Grünfeld

2. c4 other

2. Nf3

2. other:

1. d4 f5
Dutch

1. d4 ...other:

Flank

Unorthodox

a3
Na3
a4
b4
c3
Nc3
d3
e3
f3
h3
Nh3
h4

Ragozin 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) rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N2N2/PP2PPPP/R1BQKB1R
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4
ECO code: D38
Parent: Queens Gambit declined