I've been playing Chess Titans for yonks with the difficulty level set to 5 and manage to achieve about 75% statistics in my favour; so won't claim I always win, but other day I tried playing it at level 8 and I just got comprehensively beat every time. So I'm thinking only strongest players could win against it regularly at the higher levels settings. My take is that CT is a very strong chess game at lvl 8 or higher!