Openings · C25–C29

Vienna Game

The quiet knight move that keeps a gambit in reserve: develop, and decide later whether to play f4.

1.e4 e5 2.Nc3played as White

Play it through on the board below.

Practise the line

You play White; the other side answers on its own. Nothing here is saved or graded.

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Your move 1 of 20/2
  1. 1.e4e5
  2. 2.Nc3

Your move. Drag a piece, or tap it and then its square.

The idea

2.Nc3 develops, defends e4 and commits to nothing. It is the move you play when you want the option of f2–f4 — the King's Gambit a move late, with the knight already out and the check on h4 covered — without having to play it against everything.

Two games live inside it. The quiet one is 3.g3 and Bg2, a slow build where the knight on c3 supports d5 and the bishop stares down the long diagonal. The sharp one is 3.f4, which is a real gambit and needs real preparation. Choosing which to play against which reply is the whole skill of the opening.

Common mistakes

Three that come up again and again below master level: named traps and the errors every coach corrects.

Recapturing on e4 with the knight

After 4…d5
  1. 1.
  2. 2.
  3. 3.
  4. 4.
The mistake
Meeting 3…Nxe4 by taking the knight back, as though material were the point.
Why it costs
4…d5 forks the bishop on c4 and the knight on e4, and Black gets the piece straight back with a pawn in the middle of the board and a free game. The whole 3.Bc4 line depends on not doing this.
Instead
4.Qh5, the Frankenstein–Dracula, when 4…Nd6 5.Bb3 keeps a sharp game — or the simple 4.Bxf7+ Kxf7 5.Nxe4 first, which wins the piece back on your terms.

The gambit played on autopilot

After 4…Qh4+
  1. 1.
  2. 2.
  3. 3.
  4. 4.
The mistake
Grabbing the centre with 4.d4 after the gambit is accepted, without a knight on f3.
Why it costs
4…Qh4+ is check, and the only move is 5.Ke2. White has lost the right to castle on move five, with the king on the file about to be opened. It is the same accident the King's Gambit is built to avoid, arrived at a move later.
Instead
4.Nf3, which covers h4 first. That move order — knight before pawns — is the reason for playing the gambit from the Vienna at all.

Expecting the pawn to be taken

After 4…Nxe4
  1. 1.
  2. 2.
  3. 3.
  4. 4.
The mistake
Playing 3.f4 against 2…Nf6 in the belief that it wins a pawn.
Why it costs
3…d5 is the answer, and it is not a defence — it is a counterattack in the centre that ignores the gambit entirely. After 4.fxe5 Nxe4 Black has a knight on e4, a pawn on d5 and nothing to fear.
Instead
Play 3.f4 knowing 4.fxe5 Nxe4 5.Nf3 is an ordinary sharp position rather than a free pawn, or answer 2…Nf6 with 3.g3 or 3.Bc4 and keep the gambit for 2…Nc6.

In real games between beginners

  • 1 in 34games end with White giving checkmate by move 15. In all openings: 1 in 33.
  • 1 in 39games end with White getting checkmated by move 15. In all openings: 1 in 54.

From 11,447 Lichess games in this opening between players rated under 1200, blitz and slower, September 2026. How we counted.

What the engine says

After 1.e4 e5 2.Nc3, these are Black's six best moves according to Stockfish, with the bar showing Black's chance of winning. The whole list sits within 5 percentage points of win chance: none of them is a mistake, and the choice is about the positions you want to play.

  1. Nc6+0.1
  2. Nf6+0.1
  3. Bc5+0.3
  4. Bb4+0.4
  5. d6+0.5
  6. Be7+0.5

The engine's main line from Nc6: Nc6 Nf3 Nf6 d4 exd4 Nxd4 Bb4 Nxc6.

Stockfish 18, depth 24. Scores are in pawns from White's side. Another engine or depth will move individual numbers a little; the picture does not change. How we check.

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