Tree path 5 levels King's Pawn Game › Sicilian Defense › Sicilian Defense › O'Kelly Variation › Kieseritzky System
- Chess Codex
- King's Pawn Game B00
- Sicilian Defense B20
- Sicilian Defense B27
- O'Kelly Variation B28
- Kieseritzky System B28 you are here
Sicilian Defense: O'Kelly Variation, Kieseritzky System
Overview
Sicilian Defense: O'Kelly Variation, Kieseritzky System is a specific line in the Semi-Open Games family (ECO B28), 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 a6 3. b3.
The line refines Sicilian Defense: O'Kelly Variation, 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
- B28
- 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
52,486 games · White 47.4% / Draw 5.3% / Black 47.3%
| Moves | Games | W / D / B |
|---|---|---|
| Nc6 | 16,681 | |
| e6 | 10,035 | |
| d6 | 9,129 | |
| b5 | 7,674 | |
| d5 | 3,785 | |
| Nf6 | 2,618 | |
| g6 | 771 | |
| Qc7 | 464 |
Source: Lichess Opening Explorer · cached 2026-09-26 01:08:02
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Submissions are reviewed before publishing.