THE TWO KNIGHTS DEFENCE

Board Position
Named after the position of Black's two defending knights upon completion of move 3 (see left) after initial steps along the "Épine Dorsale", this defence gives an alternative to defending the Giuoco Piano. Board Position
Usually White's king's-side knight attacks Black's king's bishop's pawn (f-pawn) on KB2(f7), giving rise to interesting play with the Two Knights Gambit where chances are about even for both players (even when White seems behind in development - move 12, right).
That Knight Attack (below) also leads to the Kieseritzky Attack and the Wilkes-Barre Defence, but immediate alternatives include the Centre-Play (leading to the popular Max Lange Attack) and the quieter Modern Bishop's Opening.
Begin or Clear or Groups or see move: 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 to:
4 Ng5 d5 5 exd5 Na5 6 Bb5+ c6 7 dxc6 bxc6 8 Be2 h6 9 Nf3 e4 10 Ne5 Bd6 11 f4 exf3 12 Nxf3 0-0

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Board Position

Board Position
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THE TWO KNIGHTS DEFENCE ("Épine Dorsale")

 1. P-K4...P-K4
White
attempts to occupy the centre with his King's Pawn, opening diagonals for his KB and Q and attacking squares Q5(d5) and KB5(f5).
Black has the same idea, replying with a mutual King's Pawn in an open defence (so termed because in an open game the centre tends to become opened up by pawn exchange rather than blocked by close play).

 2. Kt-KB3...Kt-QB3
White
brings his King's Knight closer to the centre and attacks a pawn, as per the golden rule: always develop with attack if possible.
Black defends the pawn and develops his Queen's Knight.

WHITE to Move or Jump or Clear