Board Position

One of the rarer and unusual King's Pawn defences adopted by Black springing from the "Épine Dorsale". It is hardly ever seen at high level.
Black makes a brazen sacrificial attack with a P-Q4 gambit in move 2wb (left) for a line of doubtful merit, sometimes called the Englund Counter-Attack after Swedish player Fritz Englund (1871-1933), although according to the Oxford Companion to Chess the line is not attributable to him.
Board Position

Black displaces White's queen and gains a lead in development for the loss of one or two pawns, but with careful play White should quickly regain equality. Variations include the Maroczy (or Elephant), a further Black gambit considered unplayable nowadays.
Begin or Clear
or Groups
or see: 1 e4 e5 2 Nf3 d5!? 3 exd5 e4 4 Qe2 Nf6 5 Nc3 Be7 6 dxe4 Nxd5 7 d3 0-0 etc.
5 d3 Be7 6 dxe4 0-0 7 Bf5!