Chess — Marienbad System A47 : opening moves and positions

Chess · ECO A47

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.

8 / 8 · Side to move: White

1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5

FEN: rn1qkb1r/pb1ppppp/1p3n2/2p5/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq - 0 5

Source data · A47

5 PGN · 5 FEN · Opening line: 5

  • Marienbad System: 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5
  • Marienbad System: Berg Variation: 1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. c4 cxd4 6. Qxd4
  • Pseudo Queen's Indian Defense: 1. d4 Nf6 2. Nf3 b6
  • Indian Defense: Schnepper Gambit: 1. d4 Nf6 2. Nf3 b6 3. c3 e5
  • Pseudo Queen's Indian Defense: 1. d4 Nf6 2. Nf3 b6 3. e3 Bb7 4. Bd3 e6 5. Nbd2 c5 6. b3 Be7

Game and item names below retain the source’s English identifiers so you can find them in the linked documentation.

Related game questions

Chess opening explorer

Using this reference

For Marienbad System, 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

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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