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C42Opening

Petrov's Defense:Classical Attack

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4

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Black to move

Legal moves
37
Games in the next 4 moves
1,547,088
Different positions among them
504,722
Named lines from here
15

See it on the mapOn the opening map

It is reached after 9 moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4. It is a line of the Petrov's Defense.

Black is to move and has 37 legal moves. Over the next four moves — two for each side — the game can branch into 1,547,088 different games. Those games reach 504,722 different positions: most positions can be reached in more than one way, 3.1 on average.

The Lichess opening list names 15 further lines after this position, such as Marshall Variation (5... d5 6. Bd3 Bd6) and Mason-Showalter Variation (5... d5 6. Bd3 Nc6).

The same moves can be played in 94 different legal orders that all reach this position. For example 1. Nf3 e5 2. e4 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4, which starts as the Zukertort Opening.

Map of every game of the next four moves after the Petrov's Defense: Classical Attack
Every game of the next four moves from this position, as the map draws it. Each ring is one more move; the outer ring holds all 1,547,088 games.

Move by move

  1. 1. e4King's Pawn Game
  2. 1... e5King's Pawn Game
  3. 2. Nf3King's Knight Opening
  4. 2... Nf6Petrov's Defense
  5. 3. Nxe5Petrov's Defense
  6. 3... d6Petrov's Defense
  7. 4. Nf3Petrov's Defense
  8. 4... Nxe4Petrov's Defense
  9. 5. d4Petrov's Defense: Classical Attack

Named lines from here

Related openings

FEN

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