A BDG miniature...

[Date "2007.06.26"]
[White "AlexPGP"]
[Black "Thot"]
[Result "1-0"]

1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3

{A typical position in the Blackmar-Diemer Gambit.}

5.Qxf3 Qxd4

{White continues with the Ryder Gambit, or the "classical double-pawn sacrifice," as described by the late German chessmaster Diemer. Black takes the second pawn.}

6.Be3 Qb4?

{This looks like a good move because it would appear that...}

7.O-O-O

{...can't be played because of...}

7...Bg4

{...which deftly attacks the Queen and the Rook at the same time while keeping b7 protected, but...}

8.Nb5

{...threatens mate on c7 and strips b7 of its powerful protector on b4. Historically, White doesn't lose too many games at this point.}

8...Bxf3?? 9.Nxc7+

{1-0}

Cheers...