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English Defense

A40For Black

1. d4 b6

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

Win rate, Black
45.8%46.4%46.5%45.4%
Band 600, n = 10,336Band 1000, n = 50,544Band 1400, n = 52,235Band 1800, n = 103,608
Blunder rate
46.4%34.0%24.0%27.5%
Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier
CCBC
Black, band 600Black, band 1000Black, band 1400Black, band 1800
Share of games
0.2%0.4%0.5%0.5%
Of band 600 gamesOf band 1000 gamesOf band 1400 gamesOf band 1800 games
Every band, source period 2026-05
BandWhiteDrawBlackBlunderBook exitGamesTier
60049.8%4.4%45.8%46.4%ply 2.010,336C
100049.9%3.7%46.4%34.0%ply 2.050,544C
140049.7%3.8%46.5%24.0%ply 2.052,235B
180050.4%4.3%45.4%27.5%ply 2.0103,608C

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 46.4%, band median 44.6%

At 600, the English Defense scores 45.8% for Black across 10,336 games. That is below average at this level. Games in this line leave known theory around move 1 on average, and 46.4% include an early material blunder (28 games at 600).

1000Your bandC at 1000Blunder rate 34.0%, band median 42.9%

At 1000, the English Defense scores 46.4% for Black across 50,544 games. That is below average at this level. Games in this line leave known theory around move 1 on average, and 34.0% include an early material blunder (94 games at 1000).

1400Your bandB at 1400Blunder rate 24.0%, band median 40.0%

At 1400, the English Defense scores 46.5% for Black across 52,235 games. That is close to the average at this level. Games in this line leave known theory around move 1 on average, and 24.0% include an early material blunder (125 games at 1400).

1800Your bandC at 1800Blunder rate 27.5%, band median 36.4%

At 1800, the English Defense scores 45.4% for Black across 103,608 games. That is below average at this level. Games in this line leave known theory around move 1 on average, and 27.5% include an early material blunder (193 games at 1800).

Questions

Common questions about this page.

At 600, the English Defense scores 45.8% for Black across 10,336 games. That is below average at this level. Games in this line leave known theory around move 1 on average, and 46.4% include an early material blunder (28 games at 600).

At 1000, the English Defense scores 46.4% for Black across 50,544 games. That is below average at this level. Games in this line leave known theory around move 1 on average, and 34.0% include an early material blunder (94 games at 1000).

The English Defense (A40) is a line for Black. The main line runs 1. d4 b6.