Caissa Codex
B27

Sicilian Defense: Frederico Variation

Chess diagram: Sicilian Defense: Frederico Variation after 3…f5

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.

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Statistics from Lichess

58 games: White 65.5% / Draw 6.9% / Black 27.6%

The moves played next. Pick one to see it on the board.
Next moveGamesWhite / Draw / BlackW / D / B
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Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Oct 25, 2026

Engine evaluation

+3.22 White is clearly better

Best play: 4. exf5 gxf5 5. Nc3 Nf6 6. d5 Bg7 7. Bd3 O-O 8. O-O Na6

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

Overview

Sicilian Defense: Frederico Variation (ECO B27, Semi-Open Games) is a variation of the Sicilian Defense: Hyperaccelerated Dragon, reached after 1. e4 c5 2. Nf3 g6 3. d4 f5 (3 moves).

In 58 rated Lichess games between players rated 1600 to 2500, White won 65.5%, Black 27.6% and 6.9% were drawn. White's most played move here is 4. exf5, in 57% of those games. That is too few games for the percentages to mean much.

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Other lines from the same position

Instead of 3…f5, the position after Sicilian Defense: Hyperaccelerated Dragon also goes on to:

Cite this page

Caissa Codex. “Sicilian Defense: Frederico Variation (B27)”. Lichess data as of 25 Oct 2026. https://chesscodex.org/openings/sicilian-defense-frederico-variation

https://chesscodex.org/openings/sicilian-defense-frederico-variation