Tactics Trainer

Thank you for Tactics Trainer, it's really helped me improve my chess.

Just a few questions though -

The Ave. Time shown - is that for all attempts by players whether they were successful or not.   i.e. get the first move wrong, the clock stops and that time is included in the average time calculations?  Or is it the average time just for successful completion of a tactic?

And does the pass rate % include those that have run out of time but still manage to find the right move?

How is the problem rating calculated?

Thanks for this brilliant trainer.  Just one aspect of a totally brilliant chess site!  Thank you.

The average time is given only by the players who completely solved the problem.

You never run out of time in TT. If you don't solve a problem quickly enough, then your rating will not increase, but the goal is to solve the problem.

A problem rating is automatically adjusted each time an user attempts it. If he manages to solve the problem, its rating goes down, otherwise its rating goes up. The quizzes have exactly the same type of rating as the users.

The tactics trainer here is quite annoying but well worth the time.I just get tired of watching my rating jump up and down so much.900pt. swings are not uncommon.

Overall im just proud to of held it at 1900 lvl for about 3 weeks.

Well done Hazeleyes - that's pretty consistent.  I nearly reached 2000 then sank to 1650 and am gradually working my way back to 1850.  It's great training though.