B22

Sicilian Defense: Heidenfeld Variation

Chess diagram: Sicilian Defense: Heidenfeld Variation after 5. Na3

Type a move and press Enter: e4, Nf3, O-O, or from and to squares like g1f3 (e7e8q to promote). The board is also played with the mouse.

Play any move on the board to explore from there, or step through the line with ‹ › and the arrow keys.

Statistics from Lichess

2,500 games: White 48.2% / Draw 6.5% / Black 45.3%

The moves played next. Pick one to see it on the board.
Next moveGamesWhite / Draw / BlackW / D / B
1,2761,276
418418
417417
323323
3838
1111
44
44

Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Oct 29, 2026

Engine evaluation

−0.03 The position is about equal

Best play: 5... e6 6. g3 d6 7. Qe2 dxe5 8. Nxe5 Nxe5 9. Qxe5 Bd7 10. Bg2

Stockfish 19, depth 30, after the line's last move. Scores are in pawns, from White's side.

Overview

Sicilian Defense: Heidenfeld Variation (ECO B22, Semi-Open Games) is a variation of the Sicilian Defense: Alapin Variation, reached after 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3 (5 moves).

In 2,500 rated Lichess games between players rated 1600 to 2500, White won 48.2%, Black 45.3% and 6.5% were drawn. Black's most played move here is 5…d6, in 51% of those games.

Written from the Lichess opening list and explorer. Know this line well? Write about it.

Write a description or report a mistake
What would you like to send?

Markdown supported (headings ###, bold, lists, links). Submissions are reviewed before publishing.

How to play against the Sicilian Defense: Heidenfeld Variation

5…g6 scores best for Black: 57.8%, with Black winning 54.3% and White 38.8% of 418 games. The most played, 5…d6, scores 46.5% in 1,276 games, and 5…a6 scores lowest: 45.0%. Stockfish's first choice is 5…e6.

Main answers: those played in at least 5% of these games. Score: Black's wins plus half the draws, in rated Lichess games between players rated 1600 to 2500. How to play against other popular openings

Cite this page

Caissa Codex. “Sicilian Defense: Heidenfeld Variation (B22)”. Lichess data as of 29 Oct 2026. https://chesscodex.org/openings/sicilian-defense-heidenfeld-variation