Petrov's DefenseCozio Attack

C42For WhiteSolid

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2

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: 58.8%51.1%45.8%46.1%; Band 600, n = 799Band 1000, n = 4,799Band 1400, n = 3,927Band 1800, n = 6,274
Blunder rate: pendingpendingpendingpending; Band median 44.6%Band median 42.9%Band median 40.0%Band median 36.4%
Tier: BBCC; White, band 600White, band 1000White, band 1400White, band 1800
Share of games: 0.0%0.0%0.0%0.0%; Of band 600 gamesOf band 1000 gamesOf band 1400 gamesOf band 1800 games

Every band, source period 2026-05
Band	White	Draw	Black	Blunder	Book exit	Games	Tier
600	58.8%	3.9%	37.3%	-	-	799	B
1000	51.1%	4.8%	44.0%	-	-	4,799	B
1400	45.8%	5.9%	48.3%	-	-	3,927	C
1800	46.1%	7.0%	46.9%	-	-	6,274	C

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 600

At 600, the Petrov's Defense: Cozio Attack scores 58.8% for White across 799 games. That is close to the average at this level.

1000Your bandB at 1000

At 1000, the Petrov's Defense: Cozio Attack scores 51.1% for White across 4,799 games. That is close to the average at this level.

1400Your bandC at 1400

At 1400, the Petrov's Defense: Cozio Attack scores 45.8% for White across 3,927 games. That is below average at this level.

1800Your bandC at 1800

At 1800, the Petrov's Defense: Cozio Attack scores 46.1% for White across 6,274 games. That is below average at this level.

Questions

At 600, the Petrov's Defense: Cozio Attack scores 58.8% for White across 799 games. That is close to the average at this level.

At 1000, the Petrov's Defense: Cozio Attack scores 51.1% for White across 4,799 games. That is close to the average at this level.

The Petrov's Defense: Cozio Attack (C42) is a line for White. The main line runs 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2.