Chess Openings Lab
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Italian Game: Two Knights Defense, Ponziani-Steinitz Gambit

The Ponziani-Steinitz Gambit is 4.Ng5 Nxe4, where Black grabs the e4 pawn instead of defending f7. It is dubious: the engine refutes it with Bxf7+, after which Black's king is stuck in the center and White's d4 and d5 hit hard.

Moves
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Nxe4
ECO
C57
Engine
+2.29 · a large advantage for White (Stockfish 17.1, depth 20)
Played
1,242 games in our lichess sample
White scores
48.3%

Key ideas for both sides

White

  • Play Bxf7+, the engine's top move; after ...Ke7 push d4 to open lines while the king sits on e7.
  • After ...h6, take with Nxe4 and push d5 to attack the c6 knight and expose the king.
  • Avoid Nxf7: ...Qh4 and ...Nd4 give Black dangerous threats against f2 and e2.
  • Do not trade with Nxe4 on move five; ...d5 then gives Black a free center.

Black

  • After Bxf7+, the king goes ...Ke7 and must hope to win the bishop back with ...Kxf7 later.
  • Use ...h6 to kick the g5 knight and ...Nd4 to centralize after d5.
  • If White errs with Nxf7, strike with ...Qh4 and ...Nd4, hitting f2 and the queen.
  • If White plays Nxe4, answer ...d5 and gain a big pawn center with tempo.

Plans and pawn structure

After Bxf7+ Ke7 d4, White opens the center while Black's king is stuck on e7 with no castling. White wants d5, Nc3, castling and a rook on the e-file. Black's plan is to recover the f7 bishop with ...Kxf7 and then shelter the king, but the open center makes that hard. If White chooses Nxf7 or Nxe4 instead, Black gets strong central play and the gambit works.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +2.29: a large advantage for White. Its three top choices for White:

  1. +2.29 5.Bxf7+ Ke7 6.d4 h6 7.Nxe4 Kxf7
  2. −0.56 5.Nxf7 Qh4 6.Qe2 Nd4 7.g3 Nxe2
  3. −1.22 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4 Bd7

Pawns, from White's side.

How it scores on lichess

1,242 rated lichess games reached this position; White scored 48.3%.

under 120050.8%
1200–159945.7%
1600–199950.6%
2000 and up45.9%

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

How to play against it

As White, play Bxf7+ and then d4 while the black king stands on e7. Keep the initiative with Nxe4 and d5, and get the rooks to the center files. Avoid the greedy Nxf7, which walks into ...Qh4, and the timid Nxe4 before checking on f7.

Questions

What are the moves of the Italian Game: Two Knights Defense, Ponziani-Steinitz Gambit?

The Italian Game: Two Knights Defense, Ponziani-Steinitz Gambit starts 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Nxe4. Its ECO code is C57.

Is the Italian Game: Two Knights Defense, Ponziani-Steinitz Gambit good for Black?

Stockfish 17.1 rates the position +2.29 at depth 20, which is a large advantage for White. In 1,242 lichess games from our sample, White scored 48.3%. A dubious gambit for Black that works only against opponents who do not know Bxf7+ and d4.

What is the main idea of the Italian Game: Two Knights Defense, Ponziani-Steinitz Gambit?

Black counterattacks by taking on e4, but this ignores the threat on f7. After Bxf7+ Ke7 and d4, Black's king is stuck in the center and White is clearly better.

What should White play next?

The engine's first choice is Bxf7+, with Nxf7 and Nxe4 close behind. Bxf7+ forces the king to e7, and d4 next opens the center before Black can get organized.

Updated October 2026. Sources and method.