Chess Titans is for beginner, i had an ELO of 1200(well, beginners are like this) and we uses Arpad Elos method, take my challanges between Chess Titans Level 1 AI(I think it got 300). It's for beginner training. Chessmaster is for master's training.(Well, Chess Titans lets you eats his queen in special conditions eg:He eats the eating piece and another piece attacks.)
pawn(s) at a3 and b4 his queen at c5...
I personally love Shredder Chess. As for Titans I just use it for openings. I can't beat past level 8 but everything below that really isn't good if you know to look at least two moves ahead.