Sicilian Defense: Acton Extension
1. e4 c5 2. Nf3 g6 3. c4 Bh6
The Sicilian Defense: Acton Extension is a chess opening classified as ECO B27, reached after 1. e4 c5 2. Nf3 g6 3. c4 Bh6. It is a line of the Sicilian Defense. White is to move.
In 12.6 million rated Lichess games (blitz and slower), this position was reached 1 times by this move order. White won 0%, 0% were drawn and Black won 100%. The most popular continuation is 4. Nc3 (100% of games).
Engine evaluation: +0.78 (Stockfish, depth 40; best line 4. Nc3 Bg7 5. d4 cxd4 6. Nxd4 Nc6)
- ECO
- B27
- Moves
- 6 plies
- FEN
rnbqk1nr/pp1ppp1p/6pb/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R w KQkq - 1 4- PGN
1. e4 c5 2. Nf3 g6 3. c4 Bh6
Analyse with Stockfish · Board image (SVG) · Open on Lichess
Results by rating
| Average rating | Games | White / draw / Black |
|---|---|---|
| 0-1499 | 1 | |
| All | 1 |
Most played moves
| Move | Games | White / draw / Black |
|---|---|---|
| 4. Nc3 | 1 (100%) |
Master games
1 over-the-board game is classified under this line (White 0%, draw 0%, Black 100%). The strongest:
- Raymond J Kearsley (1624) – Tim R Spanton (1951) 0-1 · Hastings Masters 2019-20 · 2019-12-30
Search all games of the Sicilian Defense: Acton Extension and its sub-variations
Highest-rated Lichess games
- renielalejo (1155) – Mohammed_Elhamady (1275) 0-1 · 2026-09-02 · 180 + 2s
Comes from
Sicilian Defense: Hyperaccelerated Dragon (2. Nf3 g6) 1. e4 c5 2. Nf3 g6
More Sicilian Defense lines (all)
- Sicilian Defense (1. e4 c5) B20
- Sicilian Defense: Amazon Attack B20
- Sicilian Defense: Big Clamp Formation B20
- Sicilian Defense: Bowdler Attack B20
- Sicilian Defense: Brick Variation B20
- Sicilian Defense: Czerniak Attack B20
- Sicilian Defense: Czerniak Attack, Queen Fianchetto Variation B20
- Sicilian Defense: Euwe Attack, Prins Gambit B20
- Sicilian Defense: Gloria Variation B20
- Sicilian Defense: Grob Variation B20
- Sicilian Defense: Keres Variation B20
- Sicilian Defense: King David's Opening B20
Opening names and moves from the Lichess openings dataset; statistics from the Lichess open database, 2026-09 (CC0), sample of 12.6 million games, bots excluded; evaluations from Lichess cloud analysis (all CC0). Master games from The Week in Chess #920–#1664 by Mark Crowther, used with permission.