need to re-install chess!

hi! okay so long story short i broke chess, had to delete it, tried to reinstall it by using the "macbook applications install dvd" but that didn't work

i'm on a macbook which i'm pretty sure uses snow leopard (it was bought about a week ago so you know, whatever it would have come with that's what it is). i'm new to this so i'm not sure what else i need to specify

um so basically if someone could either tell me how to install it again, link me to somewhere where i can download that exact chess program that came with my computer, or possibly even if someone could just email me the chess program that would be amazing