Chess Openings Lab
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Italian Game: Two Knights Defense, Fritz Variation

The Fritz Variation is 4.Ng5 d5 5.exd5 Nd4, where Black leaves the d5 pawn alone and puts the knight on d4, eyeing c2 and f3. White wants to kick it with c3 and keep the extra pawn; Black wants ...b5 to dislodge the c4 bishop and win back d5.

Moves
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nd4
ECO
C57
Engine
+0.48 · a slight edge for White (Stockfish 17.1, depth 20)
Played
1,811 games in our lichess sample
White scores
41.4%

Key ideas for both sides

White

  • Play c3 straight away to question the d4 knight, the engine's first choice.
  • After ...b5, retreat Bf1 so the bishop stays safe and later supports the queenside.
  • The pawn push d6 is a practical option, returning the pawn to break up Black's center and develop.
  • Avoid Nc3 here: after ...h6 and ...Bg4 Black takes over the initiative.

Black

  • Answer c3 with ...b5, deflecting the c4 bishop away from f7 and from defending d5.
  • Take back the pawn with ...Nxd5 once the bishop retreats, putting a second knight in the center.
  • If White answers ...Nxd5 with Nxf7, take back with ...Kxf7; after cxd4 exd4 material is level and Black's center is strong.
  • Keep ...Nxc2+ in mind whenever White neglects the c2 pawn or leaves the a1 rook loose.

Plans and pawn structure

The d4 knight is the heart of Black's play: it hits c2 and blocks White's d-pawn. White's plan is c3 to chase it and quick development with Bf1, d3 and short castling. Black's plan is ...b5 and ...Nxd5, then active piece play with ...Bb7 and the queen on the long diagonal. If White grabs on f7, the engine line shows a messy game where Black's king walks but the central pawns roll. In this sample White scored only 41.4%, so the practical burden is on White.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.48: a slight edge for White. Its three top choices for White:

  1. +0.48 6.c3 b5 7.Bf1 Nxd5 8.Nxf7 Kxf7
  2. +0.31 6.d6 Qxd6 7.d3 Nd5 8.c3 Ne6
  3. −0.03 6.Nc3 h6 7.Nf3 Bg4 8.Be2 Bxf3

Pawns, from White's side.

How it scores on lichess

1,811 rated lichess games reached this position; White scored 41.4%.

under 120042.8%
1200–159938.5%
1600–199942.8%
2000 and up49.6%

Light: White wins. Grey: draws. Dark: Black wins. About the sample.

Where it goes next

  • Two Knights Defense, Fritz, Gruber Variation6.c3 · rare

How to play against it

As White, play c3 at once and retreat the bishop to f1 after ...b5. Keep c2 covered, and do not drift with Nc3, which hands Black ...h6 and ...Bg4 with easy play. Returning the pawn with d6 is a safe way to finish development.

Questions

What are the moves of the Italian Game: Two Knights Defense, Fritz Variation?

The Italian Game: Two Knights Defense, Fritz Variation starts 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nd4. Its ECO code is C57.

Is the Italian Game: Two Knights Defense, Fritz Variation good for Black?

Stockfish 17.1 rates the position +0.48 at depth 20, which is a slight edge for White. In 1,811 lichess games from our sample, White scored 41.4%. A tricky line for Black players who want activity over theory, but White can stay safe with c3 and a calm bishop retreat.

What is the main idea of the Italian Game: Two Knights Defense, Fritz Variation?

Black puts the knight on d4 to threaten c2 and prepares ...b5 to knock the c4 bishop away. Then ...Nxd5 wins back the pawn with active pieces.

What should White play next?

The engine's first choice is c3, with d6 and Nc3 close behind. c3 forces the d4 knight to commit before Black gets ...b5 and ...Nxd5 in comfortably.

Updated October 2026. Sources and method.