Rat Defense: Small Center Defense

An entry in the Encyclopedia of Chess Openings (ECO C00), reached after 4 half-moves: 1. d4 e6 2. e4 d6.

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

Rat Defense: Small Center Defense is an opening in the Encyclopedia of Chess Openings, classified under code C00. ECO group C (C00–C99) covers open games (1.e4 e5) and the French Defence, including the Ruy Lopez, Italian, Scotch and King's Gambit. This particular variation is reached after 4 half-moves from the starting position, with the move sequence 1. d4 e6 2. e4 d6.

The opening sequence in prose form: 1.d4 e6, 2.e4 d6. 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.