Apertura de los Cuatro Caballos

An opening where both players develop both knights toward the center within the first three moves.

A Four Knights branch in which White plays 4.d4 to challenge Black’s e5-pawn immediately.

A Scotch Four Knights gambit in which White plays 5.Nd5 instead of immediately recovering the pawn.

A Four Knights branch in which 4.Bb5 pressures the knight that helps support Black’s e5-pawn.

The active reply 4...Nd4 to the Spanish Four Knights, breaking symmetry and creating several simultaneous attacks.

An aggressive gambit in which White sacrifices a knight on e5 to advance the central pawns with tempo.