5 Puzzles: Smith-Morra Gambit Accepted

These puzzles are taken from Smith-Morra Gambit Accepted miniatures which begin with the following moves:  1.e4 c5 2.d4 cxd4 3.c3 dxc3 4.Nxc3

All puzzles are 'White to Move and Win'.

More Smith-Morra Gambit puzzles are found at http://www.wtharvey.com/b21.html