Chess — Rat Defense A41 : opening moves and positions
Chess · ECO A41
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. d4 d6 2. c4 e5
FEN: rnbqkbnr/ppp2ppp/3p4/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq - 0 3
Source data · A41
11 PGN · 11 FEN · Opening line: 11
- Rat Defense: English Rat:
1. d4 d6 2. c4 e5 - Rat Defense: English Rat, Lisbon Gambit:
1. d4 d6 2. c4 e5 3. dxe5 Nc6 - Rat Defense: English Rat, Pounds Gambit:
1. d4 d6 2. c4 e5 3. dxe5 Be6 - Queen's Pawn Game:
1. d4 d6 - Old Indian Defense:
1. d4 d6 2. c4 - Queen's Pawn Game: Rossolimo Variation:
1. d4 d6 2. Nf3 g6 - Wade Defense:
1. d4 d6 2. Nf3 Bg4 - Modern Defense:
1. d4 g6 2. c4 Bg7 3. Nc3 d6 - Modern Defense: Neo-Modern Defense:
1. d4 g6 2. c4 Bg7 3. e4 e5 - Robatsch Defense: Rossolimo Variation:
1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. e4 Bg4 - Zukertort Opening: Wade Defense, Chigorin Plan:
1. d4 d6 2. Nf3 Bg4 3. c4 Nd7 4. Qb3 Rb8
Game and item names below retain the source’s English identifiers so you can find them in the linked documentation.
Related game questions
- Chess — Englund Gambit A40 : opening moves and positions
- Chess — Benoni Defense A43 : opening moves and positions
- Chess — English Opening A38 : opening moves and positions
- Chess — Benoni Defense A44 : opening moves and positions
- Chess — English Opening A37 : opening moves and positions
- Chess — Indian Defense A45 : opening moves and positions
- Chess — English Opening A36 : opening moves and positions
- Chess — Marienbad System A47 : opening moves and positions
Using this reference
For Rat 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