The most frustrating is finding a technical win according to your style, but getting the problem wrong because you didn't find the best move in the position.
Probably Tactics trainer is going to be changed

The most frustrating is finding a technical win according to your style, but getting the problem wrong because you didn't find the best move in the position.
Thats what.. For example.. practically instead of going to Q vs R endgame, we would go for 3 pawns up endgame. But TT would say wrong to this.. :(
Make them a bit harder