-100 to +100 should be the default setting implemented by the site
Nah, that's a little too boring. It's fun to play someone +200 or higher now and then. If you only play +/- 100 you probably wouldn't improve as quickly either, since you're not exposed to people much better than you.
 
     
     
    
-100 to +100 should be the default setting implemented by the site