Kaulich Defense

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6 6.Bc4 Bg4

Black plays ...c6 to support the center and develops the bishop actively to g4. The pin on f3 is a typical idea: Black wants to slow White's attack and prepare safe development.

ECO Code

D00

Difficulty

Intermediate

Style

Active/Defensive

Key Theme

Pin the knight

Typical Plans

White

0-0, h3, Re1

Castle and challenge the pin. White often plays h3 to ask the bishop, then builds an attack on the kingside.

Black

...e6, ...Be7, ...0-0

Use the pin to gain time, then castle and aim to convert the extra pawn once the initiative is neutralized.

Key Detail

Watch central breaks

Black's ...c6 often supports ...d5 and later ...e5 ideas to fight back in the center.

Common Pitfalls

For White: If you spend too many moves on the pin and ignore development, Black consolidates and the pawn counts.

For Black: If you keep the bishop pinned without developing, White can build a dangerous kingside attack.

Pin, Then Consolidate

The Kaulich Defense aims to slow White's initiative with an early pin and sturdy pawn support.

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