3 / 3
  1. 1.
  3. 2.

Click a move, or focus the board and use the arrow keys.

Sicilian DefenseStaunton-Cochrane Variation

B20For BlackAggressive

1. e4 c5 2. c4

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
51.3%50.3%50.5%48.0%
Band 600, n = 4,293Band 1000, n = 17,928Band 1400, n = 13,278Band 1800, n = 32,965
Blunder rate
42.9%33.3%38.7%45.8%
Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier
BBBC
Black, band 600Black, band 1000Black, band 1400Black, band 1800
Share of games
0.1%0.1%0.1%0.2%
Of band 600 gamesOf band 1000 gamesOf band 1400 gamesOf band 1800 games
Every band, source period 2026-05
BandWhiteDrawBlackBlunderBook exitGamesTier
60044.3%4.5%51.3%42.9%ply 3.04,293B
100045.9%3.8%50.3%33.3%ply 3.017,928B
140045.5%4.0%50.5%38.7%ply 3.013,278B
180046.8%5.2%48.0%45.8%ply 3.032,965C

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 bandB at 600Blunder rate 42.9%, band median 44.6%

At 600, the Sicilian Defense: Staunton-Cochrane Variation scores 51.3% for Black across 4,293 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 42.9% include an early material blunder (7 games at 600).

1000Your bandB at 1000Blunder rate 33.3%, band median 42.9%

At 1000, the Sicilian Defense: Staunton-Cochrane Variation scores 50.3% for Black across 17,928 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 33.3% include an early material blunder (30 games at 1000).

1400Your bandB at 1400Blunder rate 38.7%, band median 40.0%

At 1400, the Sicilian Defense: Staunton-Cochrane Variation scores 50.5% for Black across 13,278 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 38.7% include an early material blunder (31 games at 1400).

1800Your bandC at 1800Blunder rate 45.8%, band median 36.4%

At 1800, the Sicilian Defense: Staunton-Cochrane Variation scores 48.0% for Black across 32,965 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 (59 games at 1800).

Questions

Common questions about this page.

At 600, the Sicilian Defense: Staunton-Cochrane Variation scores 51.3% for Black across 4,293 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 42.9% include an early material blunder (7 games at 600).

At 1000, the Sicilian Defense: Staunton-Cochrane Variation scores 50.3% for Black across 17,928 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 33.3% include an early material blunder (30 games at 1000).

The Sicilian Defense: Staunton-Cochrane Variation (B20) is a line for Black. The main line runs 1. e4 c5 2. c4.