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Modern Defence

Modern Defense
a b c d e f g h
8
Chessboard480.svg
a8 black rook
b8 black knight
c8 black bishop
d8 black queen
e8 black king
f8 black bishop
g8 black knight
h8 black rook
a7 black pawn
b7 black pawn
c7 black pawn
d7 black pawn
e7 black pawn
f7 black pawn
h7 black pawn
g6 black pawn
e4 white pawn
a2 white pawn
b2 white pawn
c2 white pawn
d2 white pawn
f2 white pawn
g2 white pawn
h2 white pawn
a1 white rook
b1 white knight
c1 white bishop
d1 white queen
e1 white king
f1 white bishop
g1 white knight
h1 white rook
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7 7
6 6
5 5
4 4
3 3
2 2
1 1
a b c d e f g h
Moves 1.e4 g6
ECO B06
Parent King's Pawn Game
Synonym(s) Robatsch Defence

The Modern Defense (also known as the Robatsch Defence after Karl Robatsch) is a hypermodern chess opening in which Black allows White to occupy the center with pawns on d4 and e4, then proceeds to attack and undermine this "ideal" center without attempting to occupy it himself. The opening has been most notably used by British grandmasters Nigel Davies and Colin McNab.

The Modern Defense is closely related to the Pirc Defence, the primary difference being that in the Modern, Black delays developing his knight to f6. (The delay of ...Nf6 attacking White's pawn on e4 gives White the option of blunting the g7-bishop with c2–c3.) There are numerous transpositional possibilities between the two openings.

The Encyclopaedia of Chess Openings (ECO) classifies the Modern Defense as code B06, while codes B07 to B09 are assigned to the Pirc. The tenth edition of Modern Chess Openings (1965) grouped the Pirc and Robatsch together as the "Pirc–Robatsch Defense".


White's strongest response to the Modern Defence is 2.d4, to which Black typically responds 2...Bg7. The main continuations are:

Other possibilities include:

Bobby Fischer suggested the move 3.h4!? as an unorthodox try against 1...g6 2.d4 Bg7, in his annotation to a game against Pal Benko. (Fischer played 3.Nc3 in the actual game.) The idea is to pry open Black's kingside by h4–h5 followed by hxg6 (...gxh5 would greatly weaken the cover to Black's king).

The flexibility and toughness of the Modern Defense has provoked some very aggressive responses by White, including the attack crudely named the Monkey's Bum, a typical sequence being 1.e4 g6 2.Bc4 Bg7 3.Qf3. (A more refined version is the Monkey's Bum Deferred, where White plays Bc4 and Qf3 only after developing their queen's knight.)


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