Tree path 5 levels King's Pawn Game › Sicilian Defense › Sicilian Defense › Modern Variations › Sicilian Defense: Kopec System
- Chess Codex
- King's Pawn Game B00
- Sicilian Defense B20
- Sicilian Defense B27
- Modern Variations B50
- Sicilian Defense: Kopec System B50 you are here
Sicilian Defense: Kopec System
Overview
Sicilian Defense: Kopec System is a specific line in the Semi-Open Games family (ECO B50), arising from a recognised theoretical position.
The Semi-Open Games group covers semi-open games — replies to 1.e4 where Black declines the symmetrical 1…e5 in favour of an asymmetric pawn structure.
It is reached after 5 plies of play, with the move sequence 1. e4 c5 2. Nf3 d6 3. Bd3.
The line refines Sicilian Defense: Modern Variations, which traces back to the root opening King's Pawn Game.
Explore the position on the interactive board, study its real-world results from Lichess, and challenge the engine when you are ready.
- ECO code
- B50
- Group
- Semi-Open Games (B)
- Plies
- 5
This overview is generated automatically from the opening's metadata. Know this line well? Write a description — submissions are reviewed before publishing.
Statistics from Lichess
70,362 games · White 46.7% / Draw 4.9% / Black 48.4%
| Moves | Games | W / D / B |
|---|---|---|
| Nf6 | 24,397 | |
| Nc6 | 23,412 | |
| e5 | 6,067 | |
| g6 | 5,354 | |
| e6 | 5,054 | |
| a6 | 2,940 | |
| Bg4 | 1,943 | |
| Nd7 | 341 |
Source: Lichess Opening Explorer · cached 2026-09-26 01:08:59
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Submissions are reviewed before publishing.