Board Position
One of the several Irregular Defences to the Queen's Gambit. Black declines White's 2.P-QB4 gambit by 2..Kt-QB3 counter-attacking White's QP (move 2wb, left), intending to develop pieces as rapidly as possible so as to attack White in the centre - often after a Kt-KB3..B-KKt5 half-pin leading to a B-for-Kt exchange (typically as move 7wb, right). The defence also arises by the same first two Black moves in a Queen's Pawn Game. Board Position
This defence used to be played exclusively by the great 19th Century Russian master, Mikhail Chigorin (or Tchigorin, his proper spelling), even in world championship matches. However it is regarded as an unusual way to defend the Queen's Gambit and analysts tend to doubt its soundness in top level play.
or: QGD: 1 d4 d5 2 c4 Nc6
to main: 3 Nc3 e5 4 cxd5 Nxd4 5 e3 Nf5 6 e4 Nd6 7 Nf3 Bg4 8 Qa4 Bd7 9 Qb3 f6 10 Be3 Ne7 11 Rc1 Nec8
to Var'n:
3 Nf3 Bg4 4 cxd5 Bxf6 5 gxf6 Qxd5 6 e3 e5 7 Nc3 Bb4 8 Bd2 Bxc3 9 bxc3 exd4 10 cxd4 Nge7
QPG: 1 d4 d5 2 Nf3 Nc6 to: 3 Bf4 Bg4 4 e3 e6 5 Be2 Bxf3 6 Bxf3 Bd6 7 Bg3 Nf6 8 0-0 0-0 9 c4 Bxg3 10 hxg3 Ne7 11 Nc3 c6