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Sicilian DefenseOld Sicilian

B30For BlackAggressive

1. e4 c5 2. Nf3 Nc6

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
47.4%48.1%47.7%46.8%
Band 600, n = 20,270Band 1000, n = 190,959Band 1400, n = 231,635Band 1800, n = 649,527
Blunder rate
43.3%47.9%42.2%39.6%
Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier
CCBB
Black, band 600Black, band 1000Black, band 1400Black, band 1800
Share of games
0.5%1.3%2.2%3.1%
Of band 600 gamesOf band 1000 gamesOf band 1400 gamesOf band 1800 games
Every band, source period 2026-05
BandWhiteDrawBlackBlunderBook exitGamesTier
60049.0%3.6%47.4%43.3%ply 4.020,270C
100048.5%3.4%48.1%47.9%ply 4.0190,959C
140048.6%3.7%47.7%42.2%ply 4.0231,635B
180048.6%4.6%46.8%39.6%ply 4.0649,527B

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 43.3%, band median 44.6%

At 600, the Sicilian Defense: Old Sicilian scores 47.4% for Black across 20,270 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 43.3% include an early material blunder (30 games at 600).

1000Your bandC at 1000Blunder rate 47.9%, band median 42.9%

At 1000, the Sicilian Defense: Old Sicilian scores 48.1% for Black across 190,959 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 47.9% include an early material blunder (209 games at 1000).

1400Your bandB at 1400Blunder rate 42.2%, band median 40.0%

At 1400, the Sicilian Defense: Old Sicilian scores 47.7% for Black across 231,635 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 42.2% include an early material blunder (232 games at 1400).

1800Your bandB at 1800Blunder rate 39.6%, band median 36.4%

At 1800, the Sicilian Defense: Old Sicilian scores 46.8% for Black across 649,527 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 39.6% include an early material blunder (576 games at 1800).

Variations

Where the line goes next.

The lines that continue the Sicilian Defense: Old Sicilian, most played first at your band. Switch the band in the header and both the figures and the order follow.

  • DCCBB32

    Sicilian Defense: Open

    1. e4 c5 2. Nf3 Nc6 3. d4

    0.1% of games at 600, n = 3,8640.4% of games at 1000, n = 54,5810.8% of games at 1400, n = 82,8831.4% of games at 1800, n = 288,986

  • BBBAB30

    Sicilian Defense: Nyezhmetdinov-Rossolimo Attack

    1. e4 c5 2. Nf3 Nc6 3. Bb5

    0.0% of games at 600, n = 1,8860.2% of games at 1000, n = 24,6240.3% of games at 1400, n = 30,8640.4% of games at 1800, n = 81,702

Questions

Common questions about this page.

At 600, the Sicilian Defense: Old Sicilian scores 47.4% for Black across 20,270 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 43.3% include an early material blunder (30 games at 600).

At 1000, the Sicilian Defense: Old Sicilian scores 48.1% for Black across 190,959 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 47.9% include an early material blunder (209 games at 1000).

The Sicilian Defense: Old Sicilian (B30) is a line for Black. The main line runs 1. e4 c5 2. Nf3 Nc6.