Looking for head to head games

I am looking for head to head games to attach to my website. I prefer games that people will not have to "learn" to play. So if you have a game(s) that are well known that would be better for me. I want to be able to offer people to play one another for free or for $$, please consider that when suggesting your game. Ask yourself, "can this game be bet on" and "will it be fun so that people will play multiple times"? Board games, card games and strategy games would work best I am looking to own the game AND the source code. If you have another suggestion as to what you want to do with the game I will consider it if the game is "right". Please include a link so I can play your game. If I agree to buy your game we are going to have to do some sort of paperwork stating I have been given the rights to the game etc. Please have your games already completed. I am not looking to have games made from scratch. Thanks