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Rat DefenseSmall Center Defense

C00For Black

1. d4 e6 2. e4 d6

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
43.2%44.7%45.1%44.2%
Band 600, n = 7,139Band 1000, n = 32,527Band 1400, n = 28,080Band 1800, n = 54,032
Blunder rate
0.0%33.3%25.0%20.0%
Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier
CCCC
Black, band 600Black, band 1000Black, band 1400Black, band 1800
Share of games
0.2%0.2%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
60052.1%4.7%43.2%0.0%ply 4.07,139C
100051.4%3.9%44.7%33.3%ply 4.032,527C
140051.2%3.6%45.1%25.0%ply 4.028,080C
180051.6%4.2%44.2%20.0%ply 4.054,032C

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 0.0%, band median 44.6%

At 600, the Rat Defense: Small Center Defense scores 43.2% for Black across 7,139 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 0.0% include an early material blunder (1 games at 600).

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

At 1000, the Rat Defense: Small Center Defense scores 44.7% for Black across 32,527 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 33.3% include an early material blunder (12 games at 1000).

1400Your bandC at 1400Blunder rate 25.0%, band median 40.0%

At 1400, the Rat Defense: Small Center Defense scores 45.1% for Black across 28,080 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 25.0% include an early material blunder (4 games at 1400).

1800Your bandC at 1800Blunder rate 20.0%, band median 36.4%

At 1800, the Rat Defense: Small Center Defense scores 44.2% for Black across 54,032 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 20.0% include an early material blunder (5 games at 1800).

Questions

Common questions about this page.

At 600, the Rat Defense: Small Center Defense scores 43.2% for Black across 7,139 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 0.0% include an early material blunder (1 games at 600).

At 1000, the Rat Defense: Small Center Defense scores 44.7% for Black across 32,527 games. That is below average at this level. Games in this line leave known theory around move 2 on average, and 33.3% include an early material blunder (12 games at 1000).

The Rat Defense: Small Center Defense (C00) is a line for Black. The main line runs 1. d4 e6 2. e4 d6.