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Sicilian DefenseMcDonnell Attack

B21For WhiteAggressive

1. e4 c5 2. f4

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
47.7%48.7%48.6%47.5%
Band 600, n = 2,292Band 1000, n = 24,482Band 1400, n = 44,618Band 1800, n = 169,259
Blunder rate
80.0%31.5%40.0%34.2%
Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier
DBCB
White, band 600White, band 1000White, band 1400White, band 1800
Share of games
0.1%0.2%0.4%0.8%
Of band 600 gamesOf band 1000 gamesOf band 1400 gamesOf band 1800 games
Every band, source period 2026-05
BandWhiteDrawBlackBlunderBook exitGamesTier
60047.7%3.8%48.6%80.0%ply 3.02,292D
100048.7%2.8%48.5%31.5%ply 3.024,482B
140048.6%2.9%48.5%40.0%ply 3.044,618C
180047.5%3.8%48.7%34.2%ply 3.0169,259B

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 bandD at 600Blunder rate 80.0%, band median 44.6%

At 600, the Sicilian Defense: McDonnell Attack scores 47.7% for White across 2,292 games. Most openings score better than this at this level. Games in this line leave known theory around move 2 on average, and 80.0% include an early material blunder (5 games at 600).

1000Your bandB at 1000Blunder rate 31.5%, band median 42.9%

At 1000, the Sicilian Defense: McDonnell Attack scores 48.7% for White across 24,482 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 31.5% include an early material blunder (54 games at 1000).

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

At 1400, the Sicilian Defense: McDonnell Attack scores 48.6% for White across 44,618 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 40.0% include an early material blunder (105 games at 1400).

1800Your bandB at 1800Blunder rate 34.2%, band median 36.4%

At 1800, the Sicilian Defense: McDonnell Attack scores 47.5% for White across 169,259 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 34.2% include an early material blunder (354 games at 1800).

Questions

Common questions about this page.

At 600, the Sicilian Defense: McDonnell Attack scores 47.7% for White across 2,292 games. Most openings score better than this at this level. Games in this line leave known theory around move 2 on average, and 80.0% include an early material blunder (5 games at 600).

At 1000, the Sicilian Defense: McDonnell Attack scores 48.7% for White across 24,482 games. That is close to the average at this level. Games in this line leave known theory around move 2 on average, and 31.5% include an early material blunder (54 games at 1000).

The Sicilian Defense: McDonnell Attack (B21) is a line for White. The main line runs 1. e4 c5 2. f4.