Indian Defense: Accelerated London System

1. d4 Nf6 2. Bf4

Indian Defense: Accelerated London System after 1. d4 Nf6 2. Bf4 87654321abcdefgh

The Indian Defense: Accelerated London System is a chess opening classified as ECO A45, reached after 1. d4 Nf6 2. Bf4. It is a line of the Indian Defense. Black is to move.

In 12.6 million rated Lichess games (blitz and slower), this position was reached 101,630 times by this move order. White won 49%, 4% were drawn and Black won 47%. The most popular continuation is 2… g6 (26% of games).

Engine evaluation: 0.00 (Stockfish, depth 60; best line 2… d5 3. e3 c5 4. Nf3 Nc6 5. Nbd2)

ECO
A45
Moves
3 plies
FEN
rnbqkb1r/pppppppp/5n2/8/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq - 2 2
PGN
1. d4 Nf6 2. Bf4

Analyse with Stockfish · Board image (SVG) · Open on Lichess

Results by rating

Average ratingGamesWhite / draw / Black
0-149929,60849%47%
1500-199953,98349%47%
2000+18,03948%45%
All101,63049%47%

Most played moves

MoveGamesWhite / draw / Black
2… g626,405 (26%)48%48%
2… d523,368 (23%)49%46%
2… e619,440 (19%)51%45%
2… d615,385 (15%)49%47%
2… c59,432 (9%)46%50%
2… Nc62,170 (2%)52%44%
2… c61,650 (2%)49%46%
2… b61,314 (1%)49%47%

Master games

35,191 over-the-board games are classified under this line (White 40%, draw 17%, Black 43%). The strongest:

Search all games of the Indian Defense: Accelerated London System and its sub-variations

Highest-rated Lichess games

Comes from

Indian Defense (1. d4 Nf6) 1. d4 Nf6

More Indian Defense lines (all)

Opening names and moves from the Lichess openings dataset; statistics from the Lichess open database, 2026-09 (CC0), sample of 12.6 million games, bots excluded; evaluations from Lichess cloud analysis (all CC0). Master games from The Week in Chess #920–#1664 by Mark Crowther, used with permission.