About this opening
Ruy Lopez: Alapin Defense, Alapin Gambit is an opening in the Encyclopedia of Chess Openings,
classified under code C60. 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 10 half-moves from the
starting position, with the move sequence 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bb4 4. c3 Ba5 5. Bxc6 dxc6.
It belongs to the Ruy Lopez family.
Within that family this is a level-2 branch (the Alapin Defense → Alapin Gambit line). The immediate parent line is Ruy Lopez: Alapin Defense, transitioned via 5…dxc6.
The opening sequence in prose form: 1.e4 e5, 2.Nf3 Nc6, 3.Bb5 Bb4, 4.c3 Ba5, 5.Bxc6 dxc6. 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.