Tactics Trainer Improvement

Hi guys. I love doing tactics, and I've done almost 10,000. And I really wish they were less frustrating. Here is what I propose:

1. Limit puzzles to only include those with an equal position before the computer's first move (which would be the mistake). Maybe something like (-2 to +2)
2. Limit puzzles to only include those that have only one or two ways to win, and all other moves lose or draw.

I think this would solve having unnecessary positions where almost all moves win, regardless of how fast it is.

So, instead of a position like this:
lichess.org/training/23815

where, sure it is mate in 2, but any other move also wins.
Instead, this position would be better:
lichess.org/analysis/2R5/pQ5p/p7/5p1k/3b1n2/8/5r2/6K1_b_-_-

where not finding the right move would cost you the win.
I think a tactic should be a one time opportunity that you either take, or lose.

I completely agree.

Completely agree, have made a forum post about this, it is really annoying and and dissapointing

Horrible. Should be taken out. The only thing that is bad on lichess. Does not say that is a mate in x moves, anything wins, I make a move and it says "failled". Everything else in lichess is perfect.

I completely agree with you OP.

Another annoyance is an obvious mate in 2... failed because there was a less obvious mate in 1. I can forgive this one, but it's annoying.

Or you find 6 "good moves" but not the magic one that evaluates slightly higher, so you fail everything. Chess.com has partial credit if you get some of the moves in the sequence, can't we get partial credit for finding a bunch of moves that are nearly as good as the best one?

I agree with statement 1.
"Limit puzzles to only include those with an equal position before the computer's first move"

Not with number 2 though.

@Gigs;

i totally agree;
en.lichess.org/forum/lichess-feedback/tactics-trainer-6

#1 Be careful what you wish for; someday you just might get it. Puzzles on chess.com have only a single solution, which years ago I observed ruins the puzzles:
http://www.chess.com/blog/DandyDanD/abducitve-reasoning-in-tactics-trainer

I agree with #9. Allowing only one solution makes it easier to solve problems, since you can rely upon that. Like when there are two equally looking captures I start asking "why is one of them wrong". Also, mutliple solutions can indirectly help you evalutate positions better and not have your mind set to "make one move and win".