Chessy
The Italian Game: Two Knights Defense – Ng5 for Black
After 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6, White can lash out with 4.Ng5 — an aggressive knight fork threat on f7. You respond 4...d5, meeting the attack head-on and opening the centre. The resulting position has been played over 13 million times, and while Stockfish gives White a tiny edge (+0.26), the practical results are much closer: White wins 53.4%, Black wins 43.5%. That small engine edge means you are slightly worse, but the margin is narrow — and your opponents will make plenty of mistakes. This page shows you exactly which continuations to trust and which attacking ideas White must avoid.
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The Two Knights Defense is a counter-attacking choice. Instead of backing up your e5 pawn with 4...Be7 or retreating the knight, you immediately strike in the centre with 4...d5. The idea is simple: if White captures on d5, you open lines for your pieces. The knight on g5 is menacing, but it's also misplaced — it can become a target if you defend accurately. Your long-term plan involves chasing the white knight away, developing quickly, and exploiting the fact that White's knight has left its kingside undeveloped. The engine evaluation (+0.26) confirms this is a sound, fighting opening for Black — you are only slightly worse, and one mistake from White can flip the game.
The Main Line: 5.exd5
By far the most common move is 5.exd5, played in 12.6 million games and scoring 53.8% for White. After 5.exd5, the best-known sequence continues 5...Na5 6.Bb5+ c6. Notice what Black achieves: the knight jumps to the rim, forcing the bishop to retreat with check, and then the c-pawn kicks it again. White's light-squared bishop is neutralised, while Black picks up the d5 pawn and gains time. This is the tabiya of the line — the engine recommends it as the best continuation for both sides. You're not just surviving; you're trading White's active bishop for a lead in development and central control. The statistics show Black scores a respectable 46.2% from this position, which is strong given the small engine edge for White.
Punish These Common Mistakes
Many White players are seduced by flashy tactics and walk into serious trouble. Three moves here are outright blunders or mistakes, and you need to know how to punish each one: - 5.Nxf7 (150,903 games, a blunder losing ~3.1 pawns). White snatches the f7 pawn with check, but the knight gets trapped. You should take with your king (5...Kxf7) and enjoy a massive lead in development while White's queen and knight are scattered. - 5.Bxd5 (143,284 games, a blunder losing ~3.6 pawns). White captures on d5 with the bishop. You simply recapture 5...Nxd5 6.Nxd5 (or 6.exd5) and Black is winning — the knight on g5 hangs, and your pieces coordinate beautifully. - 5.Bb3 (62,705 games, a mistake losing ~2.0 pawns). White retreats the bishop to b3. Black's best reply is 5...dxe4, opening the centre while the knight on g5 is misplaced. You'll win a pawn or gain a strong attack.
What the Numbers Tell You
The database of over 13 million games gives you a clear roadmap. The main line (5.exd5) is White's only correct move — every other popular option is a mistake or worse. In fact, when White plays 5.Bxd5, 5.Bb3, 5.Bb5 (32,583 games, 36.3% White score), or 5.Bd3 (7,542 games, 33.7% White score), Black's winning chances jump dramatically. Notice that all the non-capturing bishop moves score poorly for White — below 37%. This tells you that Black's setup works perfectly when White fails to take on d5 immediately. Your job is straightforward: meet 5.exd5 with the standard 5...Na5 6.Bb5+ c6 line, and against anything else, seize the initiative ruthlessly.
Results across 13,090,972 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| exd5 | 12,685,846 | 53.8% |
| Nxf7 | 150,903 | 49.4% |
| Bxd5 | 143,284 | 34.1% |
| Bb3 | 62,705 | 36.8% |
| Bb5 | 32,583 | 36.3% |
| Bd3 | 7,542 | 33.7% |
Frequently asked questions
Is the Two Knights Defense: Ng5 sound for Black?
Yes. The engine gives White only a +0.26 edge, which is a tiny advantage. With correct play, Black equalises comfortably and often outplays opponents who don't know the sharp lines. Over 13 million games show Black scoring 43.5%, a very respectable result for Black from the start.
What is the best move for Black after 4.Ng5 d5 5.exd5?
The engine's top continuation is 5...Na5, attacking the bishop on c4. After 6.Bb5+ c6, Black's light-squared bishop is neutralised and Black will recapture on d5 with good play. This is the main line and has been played millions of times.
Is 5.Nxf7 a good move for White?
No. 5.Nxf7 is a blunder that loses roughly 3.1 pawns according to the engine. After 5...Kxf7, Black's king is exposed but White's knight is lost for inadequate compensation. Black gets a winning position with accurate play.
What should Black do if White plays 5.Bxd5?
5.Bxd5 is also a blunder (losing ~3.6 pawns). Simply recapture with 5...Nxd5, then after 6.Nxd5 or 6.exd5, Black wins a piece or gains a crushing attack. The knight on g5 is hanging and White's position collapses.
How many games feature the Italian Game: Two Knights Defense: Ng5?
Over 13 million Lichess games have reached the Italian Game: Two Knights Defense: Ng5 position. White wins 53.4%, Black wins 43.5%, with 3.1% draws — based on real rated games.