Chessy
Modern Defense: Standard Line d6 – How to Play as White
After 1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4 you reach a famous crossroads in the Modern Defense. Black has chosen the solid d6 line, letting their bishop fianchetto while holding back in the centre. As White you already have a space advantage and a strong pawn duo on e4 and f4. The position is yours to steer — Stockfish gives +0.66, a clear edge for you. Below you will find the engine's best continuation, the most popular Black replies, and practical tips to turn your small plus into a full point. Jump into the interactive drill and test yourself against the most critical lines.
Play the Modern Defense: Standard Line: d6 against the engine
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Create a free account →What You Are Fighting For
The Modern Defense: Standard Line d6 is a flexible system where Black delays committing to a central pawn structure, hoping to provoke you into overextending. As White you have the space, the centre, and attacking chances on the kingside thanks to your f4-pawn. Your task is to develop naturally, maintain the pressure, and not let Black equalise with a timely …c5 or …e5 break. If you handle the opening accurately, Black will struggle to find active counterplay. The statistics bear this out: across 224,710 games at this position, White wins 53.3% of the time, while Black wins only 43.2% (draws make up the remaining 3.5%). Those numbers are a strong signal that the early initiative belongs to you.
The Engine's Best Move: 4…Nf6
When you play 4.f4, the engine's top reply for Black is 4…Nf6 (90,665 games — the most popular move by far). This natural developing move attacks your e4-pawn and asks you to commit. The engine's recommended continuation is 5.Nf3, protecting the pawn and completing development. Black typically follows with 5…c5, striking at your centre, and you answer 6.Bb5+, checking the king and interfering with Black's coordination. White scores 52.7% after 4…Nf6, which is solid but not overwhelming — this is the main line you need to be ready for. The drill below will let you practice the responses so the position feels familiar over the board.
The Most Common Black Replies
After 4.f4 you will see a variety of Black setups. Here are the five most-played continuations and how White performs against each one: 4…Nc6 (28,472 games, White scores 51.5%) — Black develops quickly but the knight on c6 can be vulnerable to a later d5 push. 4…Nd7 (28,013 games, White scores 53.7%) — A flexible choice that prepares …e5 or …c5 without committing the knight to f6. 4…e6 (17,311 games, White scores 54.3%) — Black solidifies the centre and eyes …d5 or …Ne7; your score is strongest here. 4…c6 (13,880 games, White scores 52.7%) — A patient move that supports …d5 and keeps options open. 4…a6 (10,616 games, White scores 51.5%) — A prophylactic move, often aiming for …b5 and a queenside expansion. Against all these tries, your general plan remains the same: develop your knights, castle short, and prepare e5 or f5 to crack open lines.
Common Mistakes to Avoid
The biggest danger of playing the Modern Defense as White is overreaching. Because you already have a space advantage, do not rush to attack before your pieces are coordinated. A common mistake is pushing e5 too early, allowing Black to trade down into a simplified position where your spatial edge evaporates. Another trap is neglecting the centre: if you play too many flank moves, Black can break with …c5 or …e5 and seize the initiative. Stay disciplined, develop your pieces to natural squares (Nf3, Be3, Qd2, O-O-O or O-O depending on the setup), and keep your pawn structure flexible. The small edge you have (+0.66) is real — trust it and build on it step by step.
Results across 224,710 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Nf6 | 90,665 | 52.7% |
| Nc6 | 28,472 | 51.5% |
| Nd7 | 28,013 | 53.7% |
| e6 | 17,311 | 54.3% |
| c6 | 13,880 | 52.7% |
| a6 | 10,616 | 51.5% |
Frequently asked questions
What is the best move for Black after 4.f4?
The engine's top choice for Black is 4…Nf6, attacking the e4-pawn. This is also the most popular move in practice, appearing in over 90,000 games. The recommended response for White is 5.Nf3, and after 5…c5 you continue with 6.Bb5+ to disrupt Black's coordination.
How should I handle 4…Nc6 as White?
Against 4…Nc6, you can play natural developing moves like Nf3 and Be3. The knight on c6 is a target — a timely d5 push can kick it away and gain space. Your score against this move is 51.5%, so stay calm and continue with your standard development.
Why is White's win percentage so high in this line?
White's 53.3% win rate at this position reflects the inherent space advantage and central control you get from the e4-d4-f4 pawn chain. Many Black players struggle to find active counterplay and end up in cramped positions. The key is to convert your opening advantage without overreaching.