use against fried liver attack

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bala8621
,e5 2.Nf3,Nc6 3.Bc4,Nf6 4.Ng5, d5 , Nd4 , Qxd6 7.Qc6, Nxh8? 9.Qxg7 Rf8 10.Qe4+, Be2 11.Nf3#
Josh11live
What are these chess notations. What is Nd4? Is that a move for white or black? I don’t know anymore. I will just use the standard approach.