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Benoni DefenseOld Benoni

A43For BlackAggressive

1. d4 c5 2. d5

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
43.2%45.8%46.2%47.2%
Band 600, n = 1,143Band 1000, n = 13,708Band 1400, n = 20,797Band 1800, n = 76,217
Blunder rate
0.0%39.0%26.5%27.0%
Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier
CCCB
Black, band 600Black, band 1000Black, band 1400Black, band 1800
Share of games
0.0%0.1%0.2%0.4%
Of band 600 gamesOf band 1000 gamesOf band 1400 gamesOf band 1800 games
Every band, source period 2026-05
BandWhiteDrawBlackBlunderBook exitGamesTier
60053.5%3.2%43.2%0.0%ply 3.01,143C
100051.5%2.7%45.8%39.0%ply 3.013,708C
140050.7%3.1%46.2%26.5%ply 3.020,797C
180048.6%4.1%47.2%27.0%ply 3.076,217B

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 0.0%, band median 44.6%

At 600, the Benoni Defense: Old Benoni scores 43.2% for Black across 1,143 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 0.0% include an early material blunder (1 games at 600).

1000Your bandC at 1000Blunder rate 39.0%, band median 42.9%

At 1000, the Benoni Defense: Old Benoni scores 45.8% for Black across 13,708 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 39.0% include an early material blunder (41 games at 1000).

1400Your bandC at 1400Blunder rate 26.5%, band median 40.0%

At 1400, the Benoni Defense: Old Benoni scores 46.2% for Black across 20,797 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 26.5% include an early material blunder (49 games at 1400).

1800Your bandB at 1800Blunder rate 27.0%, band median 36.4%

At 1800, the Benoni Defense: Old Benoni scores 47.2% for Black across 76,217 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 27.0% include an early material blunder (148 games at 1800).

Questions

Common questions about this page.

At 600, the Benoni Defense: Old Benoni scores 43.2% for Black across 1,143 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 0.0% include an early material blunder (1 games at 600).

At 1000, the Benoni Defense: Old Benoni scores 45.8% for Black across 13,708 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 39.0% include an early material blunder (41 games at 1000).

The Benoni Defense: Old Benoni (A43) is a line for Black. The main line runs 1. d4 c5 2. d5.