Two suggestions for TT (which is great by the way).

1. be able to sort the problems by tags. I'd like to review just checkmate in 2 problems for example. I don't see any way to use the tags to find the problems.

2. Be able to create my own problem group, say 150 problems, that I can work thru randomly. After comleting the initial pass through, be able to bring up the same problems for a second or even third time as a way to improve pattern recognition. Then create another set and do the same thing.

Again, just two ideas that may improve a great tool.

Agreed. One of the strengths of TT is the 50k problems but without a way to narrow it down you might never see the same problem again. Admittedly you see may similar ones but not frequently enough to train your brain (or at least mine )

Since you're a diamond member, you should check out GM Wolff's tactics series on Chess Mentor. He has groups of problems in particular themes (forks, pins) etc. that you can replay as often as you like.

Here: http://www.chess.com/chessmentor/courses.html?keyword=Wolff&cat_id=

Good idea, thanks, I'll check it out. I still think it would be useful to create a problem group that can be reviewed. CM is good but kinda slow to work thru.

Yeah that is the problem - especially when going back over tactic problems, hitting continue each time can be surprisingly irritating.