International chess club is the best place on the net, to play hard,after downloading the application, they give you a week or 10 days for free and after you try it, you decide if it is worth it or not the application is also good to play with your computer.

With any free chess module (fritz, stockfish, komodo, etc). All you have to do is download a platform where the chessboard interface appears, and then install the module. I have more than 100 modules installed on Arena, and I even do tournaments with them.