Chess Opening Theory/1. e4/1...e5/2. Bc4/2...Bc5/3. Qh5/3...Nc6

3...Nc6??

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a b c d e f g h
8        8
7        7
6        6
5        5
4        4
3        3
2        2
1        1
a b c d e f g h
After 3...Nc6??

The last move for black. He had not seen the threat of 4.Qxf7#.

Theory Table

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1. e4 e5 2. Bc4 Bc5 3. Qh5 Nc6??
...
...
4.Qxf7#


References

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