This is a game played by Tal (black), who missed a mate in 6 moves, and drawed with 1. ...., Ng3+ 2. Kh6, Nf5+ etc.
Can you find the mate in 6?. Black to begin.
To see the solution: drag the mouse from here... Solution:
1. ......, Nf4+! 2. Kh6 (or 2. Kh4 h5!) 2. ......, Rg6+ 3. Kxh7 Rg7+ 4. Kh6 Kg8!!
And mate with 5. Rg2 Rxg2 and 6. ......, Rg6#