A48
London System, with Bd3
1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. Bd3
In the London System, with Bd3, aim to understand the plans and pawn structures, not just memorize the first moves.
The London System, with Bd3 is a chess opening classified under ECO code A48. It is reached after the moves 1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. Bd3: 9 moves in, with Black to play.
Learn its typical plans and pawn structures rather than memorizing moves — that’s what holds up over the board.
Club players rarely lose the London System, with Bd3 in the opening itself. They lose it a few moves later, when the plan behind the moves runs out: that is what reading your own games in this line shows you.
Play the London System, with Bd3? See where you go wrong.
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