Modern Defense: Beefeater Variation

An entry in the Encyclopedia of Chess Openings (ECO A40), reached after 10 half-moves: 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 f5.

Black rook — Use ← → arrows or click moves to step through.

Black knight — Use ← → arrows or click moves to step through.

End of this line

No further variations branch from this position in our database. To explore neighbouring ideas:

About this opening

Modern Defense: Beefeater Variation is an opening in the Encyclopedia of Chess Openings, classified under code A40. ECO group A (A00–A99) covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached after 10 half-moves from the starting position, with the move sequence 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 f5.

It belongs to the Modern Defense family. Within that family this is a sub-variation (the Beefeater Variation line).

The opening sequence in prose form: 1.d4 g6, 2.c4 Bg7, 3.Nc3 c5, 4.d5 Bxc3+, 5.bxc3 f5. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.