You cant compare those ratings. Tactics Trainer is only a tool for you to strengthen your tactics and the rating is in no way relevant to your OTB rating. Chess Mentor is also just a tool to improve your chess in general and to teacher beginners the game. Cheers
Why are my ratings so diverse?
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Can anyone offer any advice as to why my ratings are so diverse please? I've used Tactics Trainer, Chess Mentor and Online Chess for a while now but my ratings are way different at 970, 1720 and 1273 respectively. This seems incongruous. Your thoughts appreciated :)