In this game American Frank Marshall one of the very first Grandmasters,is playing black.
This is a famous game because on Marshall's 23 move he played Qg3,at first sight this looks like a very bad move.
But it was such a good move as you will see when you play through the game,white resigned.
The watching chess fans thought 23...Qg3 was such a great move thet threw gold coins at the players.

(show chess board)(hide chess board)

If white plays 24.hxg3 Ne2#
If white plays 24.fxg3 Ne2+ 25.Kh1 Rxf1#
If white plays 24.Qxg3 Ne2+ 25.Kh1 Nxg3+ (not fxg3 as 26.Rxf1#) 26.Nxf1
Leaving black a piece ahead and with winning chances.