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London System
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ECO A45

London System

A universally solid, low-theory opening setup for White that builds an impenetrable pyramid center and places the dark-squared bishop actively outside the pawn chain.

London System Interactive Move Trainer

Step 0 of 5
Position Analysis
Starting position. Use the controls below to step through the moves.

Core Strategic Ideas

  • Develop the dark-squared bishop to f4 before closing the pawn structure with e3.: Develop the dark-squared bishop to f4 before closing the pawn structure with e3.
  • Construct a rock-solid pawn pyramid on c3, d4, and e3.: Construct a rock-solid pawn pyramid on c3, d4, and e3.
  • Plant a powerful knight on the e5 outpost and swing the queen to the kingside.: Plant a powerful knight on the e5 outpost and swing the queen to the kingside.

♔ White's Strategic Plan

Play Bd3, c3, Nbd2, O-O, plant Ne5, and attack Black's kingside with Qh5 or f4.

♚ Black's Strategic Plan

Challenge White's bishop with ...Bd6 or ...c5, fianchetto with ...g6, or pressure the b2 weakness with ...Qb6.

Main Variations

Classical London (2...d5 3.Bf4)Modern London vs King's IndianJobava London (3.Nc3)

Related Openings

Queen's GambitColle SystemTrompowsky Attack
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