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Indian DefenseAccelerated London System

A45For White

1. d4 Nf6 2. Bf4

A line for White. Every figure below is computed separately for each rating band, and every one carries its own sample size.

Win rate, White
50.0%49.6%48.7%48.7%
Band 600, n = 13,342Band 1000, n = 84,172Band 1400, n = 79,269Band 1800, n = 198,966
Blunder rate
60.5%51.0%45.8%44.3%
Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier
CBCB
White, band 600White, band 1000White, band 1400White, band 1800
Share of games
0.3%0.6%0.7%1.0%
Of band 600 gamesOf band 1000 gamesOf band 1400 gamesOf band 1800 games
Every band, source period 2026-05
BandWhiteDrawBlackBlunderBook exitGamesTier
60050.0%3.8%46.2%60.5%ply 3.013,342C
100049.6%3.4%47.0%51.0%ply 3.084,172B
140048.7%3.8%47.6%45.8%ply 3.079,269C
180048.7%4.7%46.6%44.3%ply 3.0198,966B

Results by band

What it actually does, band by band.

All four bands are on the page. The one matching your rating is marked. Nothing here is averaged across bands.

600Your bandC at 600Blunder rate 60.5%, band median 44.6%

At 600, the Indian Defense: Accelerated London System scores 50.0% for White across 13,342 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 60.5% include an early material blunder (38 games at 600).

1000Your bandB at 1000Blunder rate 51.0%, band median 42.9%

At 1000, the Indian Defense: Accelerated London System scores 49.6% for White across 84,172 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 51.0% include an early material blunder (202 games at 1000).

1400Your bandC at 1400Blunder rate 45.8%, band median 40.0%

At 1400, the Indian Defense: Accelerated London System scores 48.7% for White across 79,269 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 45.8% include an early material blunder (190 games at 1400).

1800Your bandB at 1800Blunder rate 44.3%, band median 36.4%

At 1800, the Indian Defense: Accelerated London System scores 48.7% for White across 198,966 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 44.3% include an early material blunder (458 games at 1800).

Questions

Common questions about this page.

At 600, the Indian Defense: Accelerated London System scores 50.0% for White across 13,342 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 60.5% include an early material blunder (38 games at 600).

At 1000, the Indian Defense: Accelerated London System scores 49.6% for White across 84,172 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 51.0% include an early material blunder (202 games at 1000).

The Indian Defense: Accelerated London System (A45) is a line for White. The main line runs 1. d4 Nf6 2. Bf4.