What is this Puzzle?

Hi

check this puzzle: (https://www.chess.com/puzzles/problem/2224034) I have came across it while playing rated puzzles, clearly this puzzle can be solved in many ways but only one is accepted, even when I did analysis it tells if I don't play the specific move it will be a draw

It seems pretty straightforward to me.

I think staff have been removing those from the puzzle bank, but if you get a mate no matter what type of position, it's looking for the fastest mate. In most cases it's because it came from a game and you have to mate before the 50 moves with no captures or pawn moves is encountered.

If you run across a bad puzzle, you can directly report them on the website.

https://support.chess.com/article/1223-how-do-i-report-a-bad-puzzle

I feel fastest mate shouldn't matter in rated puzzle, any move that still keep me in guaranteed winning position should be naturally accepted. but anyway, the analysis clearly says any move but KG3 is a draw which is clearly wrong, unless it's taking the 50-moves rule you mentioned into consideration but again from my perspective there is no way to tell how many moves without capture there have been before reaching current position so I can't be expected to predict this is 48-th move. furthermore, if it is indeed draw because of 50-move rule then we have reached the terminal position the analysis shouldn't just let me keep playing for like more 10 moves, right?

By the way I have just tried the analysis to see what happens if I repeat moves, it doesn't even tells me it's draw it lets me repeat moves however I want, so it doesn't make sense that it's taking 50-move rules into consideration?

My point is: even if the puzzle wants me to checkmate in fewest moves, the analysis is clearly glitched

This puzzle is anything but straightforward. It has a hidden characteristic: the no-pawn no-capture move count is already at 48, so you have to mate in 2 otherwise it's a draw.

Of course, there is absolutely no way for the solver to figure this out.

And yes, there is only one solution: remove this puzzle from the database.

It's not glitched. Any moves other than the solution are draws due to the 50 move rule based on the source of the puzzle.

[FEN "8/8/8/8/5k2/4r3/5K2/8 w - - 96 115"]

That's the position string. The 96 means there have been 48 moves made without a capture or pawn move. So mate has to be done in two moves or it's a draw. The engine evaluation will give 0.0 if you do anything else and the analysis board doesn't do draw claims, so will allow you to play anything out.

That all said, the puzzle has been removed from the pool of available ones.

I actually like those puzzles. Finding the fastest mate is a good calculation skill to practice.

However, staff agree that the hidden information makes them not good for the trainer, so they remove them when reported.