King's Defences

Opening Databases

MICOS King’s Defences Encyclopedia provides a structured overview of opening systems in which Black allows White early central space while preparing counterplay through flexible pawn structures and active piece development. These openings often lead to dynamic positions where timing, coordination, and structural understanding are critical.


Within MICOS, King’s Defences are organized by clearly defined chess notation move orders, allowing each opening group to be understood as a coherent system rather than a collection of unrelated variations. This encyclopedia serves as a reference point for studying defensive structures, counterattacking ideas, and the strategic balance between space and activity.

King's Defences Opening Group

King's Defences - Opening Databases

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B00.IK Irregular King's Defences

These defences introduce early asymmetry and disrupt conventional opening patterns. 1.e4 with 2: a5, a6, b6, f5, f6, g5, h5, h6, Na6, Nh6.

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B01.SI Sicilian Defence

The Sicilian Defence begins with 1.e4 c5, immediately challenging White’s central control while preparing for counterplay on the queenside. 

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B02.CK Caro-Kann Defence

The Caro–Kann is a common defence against the King’s Pawn Opening. It often leads to good endgames for Black, who has a better pawn structure.

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B03.SC Scandinavian Defence

Starting with 1.e4 d5, the Scandinavian Defence allows Black to immediately challenge the center, often leading to dynamic and open positions.

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B04.PI Pirc Defence

Black works to undermine White’s centre from the flanks. Its first appearance in a World Championship match was in 1972 by Bobby Fischer against Boris Spassky.

French Defence
B05.FR French Defence

A solid response to 1.e4, aiming for a strong pawn structure and counterplay.

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B06.RO Robatsch Defence

The Robatsch defence after Karl Robatsch is a hypermodern chess opening in which Black allows White to occupy the center with pawns on d4 and e4.

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B07.PT Pterodactyl Defence

The Pterodactyl Defence is an aggressive and creative branch of the Robatsch, where Black combines a kingside fianchetto with an early …c5 to challenge White’s center from the flanks. It’s named for its sharp, airborne style and offbeat variations.

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B08.ND Nimzowitsch Defence

The Nimzowitsch Defence, initiated with 1.e4 Nc6, offers a flexible and unpredictable opening strategy, challenging traditional pawn structures.

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B09.AL Alekhine Defence

Alekhine Defence, beginning with 1.e4 Nf6, invites White to overextend, creating opportunities for counterplay and tactical strikes.