French Defense: Advance Variation, Milner-Barry Gambit, Main Line
The Milner-Barry main line is 6...cxd4 7.cxd4 Bd7 8.O-O, where White castles and lets the d4 pawn go for good. Black can take it with 8...Nxd4, while White plays for development, kingside space and attacking chances against the uncastled king.
- Moves
- 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3 cxd4 7.cxd4 Bd7 8.O-O
- ECO
- C02
- Engine
- −0.21 · level (Stockfish 17.1, depth 20)
- Played
- 590 games in our lichess sample
- White scores
- 51.1%
Key ideas for both sides
White
- After 8...Nxd4, 9.Nbd2 is the engine's move: after trades on d4, the knight reaches f3 and stays near the kingside.
- Nf3 then hits the bishop on d4, and Bd2 or Be3 prepares to trade off Black's strong dark-squared bishop.
- If Black plays 8...a6, 9.Kh1 steps off the a7-g1 diagonal, and 11.b4 later offers a second pawn to open lines.
Black
- Take with 8...Nxd4. With the bishop on d7, Bb5+ is no longer a threat, so the extra pawn is safe for now.
- Bring the bishop to c5, develop the g8-knight to e7, then castle; d4 is Black's best outpost.
- 8...Rc8 skips the pawn for now and uses the c-file; after 9.Be2 Nge7 10.Nc3 Nf5, d4 is still under fire.
Plans and pawn structure
After ...Nxd4 Black is a pawn up with a strong piece on d4, but the king sits on e8 and the kingside is undeveloped. White wants to trade the d4 piece, then use the e5 pawn, Qg4 and a rook on c1 to attack. Black's plan is ...Ne7, ...Nc6 or ...Nf5, and castling. The d5 pawn is passed, so every trade brings Black closer to a good endgame.
What the engine plays from here
Stockfish 17.1 at depth 20 rates the position −0.21: level. Its three top choices for Black:
- −0.21 8...Nxd4 9.Nbd2 Bc5 10.Nxd4 Bxd4 11.Nf3
- +0.22 8...a6 9.Kh1 Nxd4 10.Be3 Bc5 11.b4
- +0.23 8...Rc8 9.Be2 Nge7 10.Nc3 Nf5 11.Na4
Pawns, from White's side.
How it scores on lichess
590 rated lichess games reached this position; White scored 51.1%.
Light: White wins. Grey: draws. Dark: Black wins. About the sample.
Where it goes next
- Advance Variation, Milner-Barry Gambit, Sørensen Variation8...Nxd4 · rare
How to play against it
Take the pawn with 8...Nxd4 and develop at once: ...Bc5, ...Ne7 and castle. Don't cling to everything; if White trades on d4 and attacks, returning a pawn to finish development is fine. Avoid ...Qxb2 grabs that pull the queen far from the king.
Questions
What are the moves of the French Defense: Advance Variation, Milner-Barry Gambit, Main Line?
The French Defense: Advance Variation, Milner-Barry Gambit, Main Line starts 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3 cxd4 7.cxd4 Bd7 8.O-O. Its ECO code is C02.
Is the French Defense: Advance Variation, Milner-Barry Gambit, Main Line good for White?
Stockfish 17.1 rates the position −0.21 at depth 20, which is level. In 590 lichess games from our sample, White scored 51.1%. A rich gambit line where Black's extra, passed d-pawn faces White's development; both sides need good calculation.
What is the main idea of the French Defense: Advance Variation, Milner-Barry Gambit, Main Line?
White gives the d4 pawn for a lead in development and kingside space. Black takes with 8...Nxd4, places the bishop on c5 or d4, and races to castle before White's pieces arrive.
What should Black play next?
The engine's first choice is Nxd4, with a6 and Rc8 close behind. 8...Nxd4 wins the pawn now that ...Bd7 has removed the Bb5+ trick.
Related lines
Updated October 2026. Sources and method.