Chess Codex
Tree path 8 levels King's Pawn Game › Sicilian Defense › Sicilian Defense › French Variation › Open › Sicilian Defense: French Variation, Normal › Sicilian Defense: Pin Variation › Koch Variation
  1. Chess Codex
  2. King's Pawn Game B00
  3. Sicilian Defense B20
  4. Sicilian Defense B27
  5. French Variation B40
  6. Open B40
  7. Sicilian Defense: French Variation, Normal B40
  8. Sicilian Defense: Pin Variation B40
  9. Koch Variation B40 you are here
B40

Sicilian Defense: Pin Variation, Koch Variation

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Overview

Sicilian Defense: Pin Variation, Koch Variation is a specific line in the Semi-Open Games family (ECO B40), 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 11 plies of play, with the move sequence 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. e5.

The line refines Sicilian Defense: Pin 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
B40
Group
Semi-Open Games (B)
Plies
11
Parent
Sicilian Defense: Pin Variation

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.

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Related variations at the same level

Sister lines that share the same parent Sicilian Defense: Pin Variation:

https://test.av-webdevs.com/openings/sicilian-defense-pin-variation-koch-variation