Chess — Petrov's Defense C43 : opening moves and positions
Chess · ECO C43
An ECO code groups opening lines, not one forced position. Step through legal notation from the CC0 Lichess dataset. This is a study viewer, without engine evaluation or a claim that a line is best.
1. e4 e5 2. Nf3 Nf6 3. d4
FEN: rnbqkb1r/pppp1ppp/5n2/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq - 0 3
Source data · C43
12 PGN · 12 FEN · Opening line: 12
- Petrov's Defense: Modern Attack:
1. e4 e5 2. Nf3 Nf6 3. d4 - Petrov's Defense: Modern Attack:
1. e4 e5 2. Nf3 Nf6 3. d4 exd4 - Petrov's Defense: Modern Attack, Symmetrical Variation:
1. e4 e5 2. Nf3 Nf6 3. d4 d5 - Petrov's Defense: Modern Attack, Center Variation:
1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 - Petrov's Defense: Modern Attack, Murrey Variation:
1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 Nc6 - Petrov's Defense: Modern Attack, Center Attack:
1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qxd4 - Petrov's Defense: Modern Attack, Steinitz Variation:
1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 - Petrov's Defense: Modern Attack, Tal Gambit:
1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Bb5 - Petrov's Defense: Modern Attack, Bardeleben Variation:
1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 Nc5 6. Nxd4 Nc6 - Petrov's Defense: Modern Attack, Trifunovic Variation:
1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Bd6 6. O-O O-O 7. c4 Bxe5 - Bishop's Opening: Urusov Gambit:
1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 - Bishop's Opening: Urusov Gambit, Keidansky Gambit:
1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 Nxe4 5. Qxd4
Game and item names below retain the source’s English identifiers so you can find them in the linked documentation.
Related game questions
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Using this reference
For Petrov's Defense, start at the first position and step through the moves rather than memorizing the final board. After each move, look for the piece that moved and the squares it now influences. The same opening name can cover several branches, so use the selected line’s move order as your reference.
The final position in the viewer is where this recorded line ends, not a verdict on the position. Choose another listed branch to see where the paths separate. The viewer displays legal source moves; it does not provide an engine evaluation or establish a forced continuation.
Sources and scope
Public source snapshot; changes after this version may differ. 2026-11-03
chess-a · CC0
chess-b · CC0
chess-c · CC0
chess-d · CC0
chess-e · CC0