Tree path 3 levels King's Pawn Game › King's Knight Opening › Petrov's Defense
- Chess Codex
- King's Pawn Game C20
- King's Knight Opening C40
- Petrov's Defense C42 you are here
Petrov's Defense
Overview
Petrov's Defense is a specific line in the Open Games family (ECO C42), arising from a recognised theoretical position.
The Open Games group covers open games — classical 1.e4 e5 openings where both sides contest the centre directly with pawns.
The line arises from 4 plies — specifically the moves 1. e4 e5 2. Nf3 Nf6.
The line refines King's Knight Opening, which traces back to the root opening King's Pawn Game.
The line splits into 5 documented sub-systems: Petrov's Defense, Italian Variation, Modern Attack, and others.
Counted recursively, this branch covers 53 sub-variations at all depths.
Explore the position on the interactive board, study its real-world results from Lichess, and challenge the engine when you are ready.
- ECO code
- C42
- Group
- Open Games (C)
- Plies
- 4
- Parent
- King's Knight Opening
- Direct variations
- 5
- Total in subtree
- 53
This overview is generated automatically from the opening's metadata. A more detailed, human-written description is on the way — and you can speed it up by suggesting one yourself.
Statistics from Lichess
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Source: Lichess Opening Explorer · cached
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Variations (5)
Show all 53 sub-variations (full subtree)
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