I brought this up before but I wanted to ask if this is currently being developed. I think this would be a wonderful feature.
Yes it would be a great feature.
Sorting by difficulty like the training puzzles might not be.
In addition, an added forced mate category could be added to the training drills, including a forks, skewers, etc. section.
This would be especially useful for pattern recognition
I believe chessbase does this, and definately lucaschess. I've tried it I think and it was gonna take a really long time for cpu to work on.