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King's Gambit DeclinedQueen's Knight Defense

C30For BlackAggressive

1. e4 e5 2. f4 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
47.1%44.7%44.5%44.8%
Band 600, n = 5,595Band 1000, n = 43,460Band 1400, n = 50,096Band 1800, n = 95,492
Blunder rate
60.0%42.4%34.7%28.6%
Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier
DCCC
Black, band 600Black, band 1000Black, band 1400Black, band 1800
Share of games
0.1%0.3%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
60049.7%3.2%47.1%60.0%ply 4.05,595D
100052.7%2.7%44.7%42.4%ply 4.043,460C
140052.7%2.9%44.5%34.7%ply 4.050,096C
180051.6%3.6%44.8%28.6%ply 4.095,492C

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 60.0%, band median 44.6%

At 600, the King's Gambit Declined: Queen's Knight Defense scores 47.1% for Black across 5,595 games. Most openings score better than this at this level. Games in this line leave known theory around move 2 on average, and 60.0% include an early material blunder (10 games at 600).

1000Your bandC at 1000Blunder rate 42.4%, band median 42.9%

At 1000, the King's Gambit Declined: Queen's Knight Defense scores 44.7% for Black across 43,460 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 42.4% include an early material blunder (92 games at 1000).

1400Your bandC at 1400Blunder rate 34.7%, band median 40.0%

At 1400, the King's Gambit Declined: Queen's Knight Defense scores 44.5% for Black across 50,096 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 34.7% include an early material blunder (98 games at 1400).

1800Your bandC at 1800Blunder rate 28.6%, band median 36.4%

At 1800, the King's Gambit Declined: Queen's Knight Defense scores 44.8% for Black across 95,492 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 28.6% include an early material blunder (140 games at 1800).

Questions

Common questions about this page.

At 600, the King's Gambit Declined: Queen's Knight Defense scores 47.1% for Black across 5,595 games. Most openings score better than this at this level. Games in this line leave known theory around move 2 on average, and 60.0% include an early material blunder (10 games at 600).

At 1000, the King's Gambit Declined: Queen's Knight Defense scores 44.7% for Black across 43,460 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 42.4% include an early material blunder (92 games at 1000).

The King's Gambit Declined: Queen's Knight Defense (C30) is a line for Black. The main line runs 1. e4 e5 2. f4 Nc6.