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Zukertort OpeningBlack Mustang Defense

A04For BlackSolid

1. 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
48.7%47.2%45.8%43.5%
Band 600, n = 13,604Band 1000, n = 46,014Band 1400, n = 31,995Band 1800, n = 52,448
Blunder rate
40.7%49.5%41.3%40.0%
Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier
BCCD
Black, band 600Black, band 1000Black, band 1400Black, band 1800
Share of games
0.3%0.3%0.3%0.3%
Of band 600 gamesOf band 1000 gamesOf band 1400 gamesOf band 1800 games
Every band, source period 2026-05
BandWhiteDrawBlackBlunderBook exitGamesTier
60046.1%5.2%48.7%40.7%ply 2.013,604B
100048.6%4.3%47.2%49.5%ply 2.046,014C
140050.3%4.0%45.8%41.3%ply 2.031,995C
180052.0%4.5%43.5%40.0%ply 2.052,448D

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 40.7%, band median 44.6%

At 600, the Zukertort Opening: Black Mustang Defense scores 48.7% for Black across 13,604 games. That is close to the average at this level. Games in this line leave known theory around move 1 on average, and 40.7% include an early material blunder (27 games at 600).

1000Your bandC at 1000Blunder rate 49.5%, band median 42.9%

At 1000, the Zukertort Opening: Black Mustang Defense scores 47.2% for Black across 46,014 games. That is below average at this level. Games in this line leave known theory around move 1 on average, and 49.5% include an early material blunder (99 games at 1000).

1400Your bandC at 1400Blunder rate 41.3%, band median 40.0%

At 1400, the Zukertort Opening: Black Mustang Defense scores 45.8% for Black across 31,995 games. That is below average at this level. Games in this line leave known theory around move 1 on average, and 41.3% include an early material blunder (63 games at 1400).

1800Your bandD at 1800Blunder rate 40.0%, band median 36.4%

At 1800, the Zukertort Opening: Black Mustang Defense scores 43.5% for Black across 52,448 games. Most openings score better than this at this level. Games in this line leave known theory around move 1 on average, and 40.0% include an early material blunder (90 games at 1800).

Questions

Common questions about this page.

At 600, the Zukertort Opening: Black Mustang Defense scores 48.7% for Black across 13,604 games. That is close to the average at this level. Games in this line leave known theory around move 1 on average, and 40.7% include an early material blunder (27 games at 600).

At 1000, the Zukertort Opening: Black Mustang Defense scores 47.2% for Black across 46,014 games. That is below average at this level. Games in this line leave known theory around move 1 on average, and 49.5% include an early material blunder (99 games at 1000).

The Zukertort Opening: Black Mustang Defense (A04) is a line for Black. The main line runs 1. Nf3 Nc6.