As I have mentioned in the lesson about taking free pieces almost all chess games are won by first obtaining a material advantage.

I have added some capture exercises to this site. They are intended for the beginning chess player, but it is assumed that this chess player knows how the pieces move and also knows about the value of these pieces.
Refresh the page to get the next random exercise.

The exercises can be seen as a follow-up on this last one and the lesson about taking free pieces.