A comon mistake people make after a sacrafice is that they play as if they lost the material, rather than gave it up willfully!
1. e4 e5
2. Nf3 Nc6
3. d4 exd4
4. Bc4 Bb4+
5. c3 dxc3
6. o-o Nf6
7. e5 Ng4
8. Bxf7+ Kf8
9. Bh5 Ngxe5
10. Nxe5 Nxe5
11. a3 Be7
12. Nxc3
I must be careful not to make that mistake.
1. e4 e5
2. Nf3 Nc6
3. d4 exd4
4. Bc4 Bb4+
5. c3 dxc3
6. o-o Nf6
7. e5 Ng4
8. Bxf7+ Kf8
9. Bh5 Ngxe5
10. Nxe5 Nxe5
11. a3 Be7
12. Nxc3
I must be careful not to make that mistake.