I believe solving puzzles is good practice, but when I have trouble with a particular puzzle there should be an easy way to flag it for future practice. I know I can download the pgn and clutter a directory with puzzles, but it would be VERY useful if there was a button I could click to have the puzzle added to an online list I could re-study at will.
You mean something like a bookmark?
You have done 21,000 puzzles. You could have 1,700 bookmarks and then you'd want to sort them by theme or by rating.
That sounds fairly difficult.
I believe solving puzzles is good practice, but when I have trouble with a particular puzzle there should be an easy way to flag it for future practice. I know I can download the pgn and clutter a directory with puzzles, but it would be VERY useful if there was a button I could click to have the puzzle added to an online list I could re-study at will.