Colle: 3...g6

Before the first move

The Colle System is a solid, strategic opening where White builds a sturdy pyramid of pawns. By playing 3...g6, Black chooses a flexible setup, preparing to fianchetto the bishop and challenge White's central control from the flank.

1. d4White · your move

Push your pawn to d4. This classical opening move claims space in the center and opens lines for your queen and dark-squared bishop, setting a solid foundation for your development.

1... d5Black

Black replies with d5, the most solid response. While alternatives like the English Defense with b6 or the sharp Englund Gambit with e5 exist, this move leads to a symmetrical struggle for central influence.

Other paths here: Na6 (Australian Defense) · g5 (Borg Defense: Borg Gambit) · b6 (English Defense) · e5 (Englund Gambit)

2. Nf3White · your move

Develop your knight to f3. This move controls the e5 and d4 squares while preparing for kingside castling. It keeps your options open before committing your other pieces.

Other paths here: Qd3 (Amazon Attack) · e4 (Blackmar-Diemer Gambit) · e3 (Queen's Pawn Game) · Bf4 (Queen's Pawn Game: Accelerated London System)

2... Nf6Black

Black responds with Nf6, maintaining the balance. Other popular choices here include the Krause Variation with c5 or the Chigorin Variation with Nc6, but the knight move is the most standard and flexible.

Other paths here: Nc6 (Queen's Pawn Game: Chigorin Variation) · c5 (Queen's Pawn Game: Krause Variation) · Bf5 (Queen's Pawn: 2.Nf3 Bf5) · Bg4 (Queen's Pawn: 2.Nf3 Bg4)

3. e3White · your move

Push your pawn to e3. This move solidifies your d4 pawn and prepares to develop your light-squared bishop to d3. You are building the characteristic Colle triangle of pawns.

Other paths here: Bf4 (Queen's Pawn Game: London System) · g3 (Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan) · c3 (Queen's Pawn: 3.c3) · Bg5 (Queen's Pawn Game: Torre Attack)

3... g6Black

Black replies with g6, choosing a Kingside Fianchetto. While the main line Colle usually sees e6, this move challenges White's setup differently. Other options like Bf5 or the aggressive Bg4 are also frequently seen.

Other paths here: Bg4 (Colle: 3...Bg4) · c5 (Colle: 3...c5) · c6 (Colle: 3...c6) · Bf5 (Queen's Pawn Game: Colle System, Anti-Colle)

Where you stand

The game has reached a crossroads where White will aim for a central breakthrough with c4 or e4, while Black will finish the fianchetto and look to strike at the center. Both sides have solid positions with plenty of room for creative maneuvering in the middlegame.

• f1-d3 Develop bishop to its most active square
• f8-g7 Fianchetto the bishop to pressure the center
• e1-g1 Secure the king and connect rooks
• c2-c4 Challenge the d5 pawn and open lines
• e8-g8 Castle kingside to complete early development