Nbd2 System

1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nbd2 0-0 5.a3 Be7 6.e4 d6

White meets the check with Nbd2, avoids doubled pawns, and expands with e4. Black usually adopts a compact center, then tries to challenge White's pawn chain with timely pawn breaks.

ECO Code

E11

Difficulty

Intermediate

Style

Strategic

Key Theme

Space vs breaks

Main Plans

White: Keep the Center

Bd3, 0-0, Re1

White supports e4 and often aims for kingside space without rushing tactics.

Black: Challenge with ...e5

...Nbd7, ...e5

Black tests White's center and seeks counterplay on dark squares.

Queenside Structure

a3 and bishop retreat

The early a3 asks Black to define bishop placement and slightly weakens White's queenside dark squares.

A Practical White Setup

The Nbd2 system is easy to learn and gives White clear strategic plans.

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