French Defense: Advance Variation – Meeting 3...Bb4+ with Confidence

At first glance, a check on b4 seems unpleasant – your pawn on e5 is attacked, and you have to waste a move dealing with the threat. But 4.c3 does more than just block the check. It reinforces your centre, prepares Nf3, and forces Black to reveal their plan immediately. White scores 58.8% across all games, with only 37.6% going to Black. The engine evaluation of +1.14 confirms this is not a tiny edge – you are genuinely better here. The reason is simple: Black's bishop has left the kingside undeveloped, and after c3 they must retreat or trade it, often losing time.

After 4.c3, the engine's top recommendation is Be7 – Black retreats and hopes to play ...c5 soon. Your job is straightforward: develop your knight to f3 and then challenge Black's centre with c3 already in place. The ideal setup runs Be7 Nf3 c5 Bd3, as suggested by the engine. Notice you are following classical principles: develop pieces, castle quickly, and keep your strong pawn on e5. You don't need to know complex theory here – just keep pressure on Black's position and they will often crack. White's scoring is consistently above 57% against every reasonable Black reply.

Some of Black's choices are far worse than others. Here is what the numbers say from your perspective as White: Ba5 is by far the most common (162,033 games) but is classed as an inaccuracy – it loses about 0.9 pawns. White scores 59.1% against it. The best move for Black is actually the rare Bf8 (only 7,506 games), where White still scores 60.7%. The real gifts come when Black makes a serious mistake: Bxc3+ (853 games) is a blunder costing about 3.5 pawns – White wins 85.3% of those games. Nc6 (566 games) is even worse, a blunder losing about 3.7 pawns – White scores 74.0%. If you see either of those, pounce.

If Black plays 4...Bxc3+ , they give up a bishop for a pawn and leave you with excellent development. After you recapture with the b-pawn (5.bxc3), you have a powerful centre, an open b-file, and Black is down a piece for insufficient compensation. The numbers do not lie: White wins 85.3% of those games. Similarly, 4...Nc6 simply ignores the attack on e5 and develops a knight to a square where it does nothing to challenge your centre. You can reply 5.Nf3 or even 5.Bd3 , and Black's position quickly becomes cramped. White scores 74.0% here. Stay alert for these mistakes and your win rate will climb.