Why are chess puzzles so frequently incorrect?

On 1/5/21, Chess.com offered a "Chess Puzzle of the Day" by "DailyFun." In this puzzle, promoting a pawn to a queen in an end game is deemed "wrong"! I'm surprised Chess.com published this lame puzzle. If there is a better move, I cannot find it.

http://www.ideachess.com/chess_tactics_puzzles/tactics_n/114100

When solving chess puzzles--from a variety of sources--I notice that the programmed solution to about one in five is unequivocally incorrect. My conclusion is that developers of chess puzzles are chess challenged. But maybe it's me!

Can anybody recommend an app or source of puzzles that has legitimate solutions...at least legit most of the time?

This one? What is your proposed move?

If you play c1(Q) first, you get mated by 1..Qg7# or 1..Qxh7# or 1..Rxh7#.

So yes, that move would be wrong.

Not just "wrong."

Wrong "wrong."

Why would black rook to b7 be incorrect?

I solve a lot of puzzles and I'd say about 99% of the solutions are correct.

Though occassally I'll have to choose between 2 moves: one which gives my position a +5 advantage and one which leads to forced mate. I'll choose the former and it will be marked as wrong, which I think is unfair.

Try it out. With the puzzle solution, black mates in a few moves. With Rb7, it looks like the best black can hope for is a draw.

It is black's move, and the white queen is one ply away from delivering mate. So ONLY the black rook to b7 is able to stop Ra7 from supporting the attacking white queen from moving to g7 for check mate.

Any other move does not thwart the immanent mate. So to say Rb7 is "incorrect," as DailyFun insists, negates logic; for what sense does it make to create a position where mate in one move away but the solution is to ignore it? If employing a tactic is the objective as JDSmasher suggests then why create a puzzle where the best move is incorrect? Chess is a game of logic, not chaos.

So what other ply can stop the white queen from mating on g7?

The solution is Qh1+! somebody else was asking about this puzzle in another thread. It's all about deflection and playing the absolutely most forcing move possible with tempo on each turn, which is necessary or black himself will be getting mated. Honestly though, the foolishness of someone with a puzzle rating of 749 coming onto the forums and claiming the puzzles are incorrect...no, it's just that you don't see the correct solution. 

Because you win with Qh1+. The line is:

1. ...Qh1+ 2.Kxh1 2. ...c1=Q+ 3.Kg2  3. ...Qc6+ (and now there is mate very soon)

first option 4. Qd5 and you pick up the queen and mate very soon (pretty similar to options below)
second option 4. Kg1 4. ...Rb1+ 5. Kh2 5. ...Qh1#
third option 4.Kh2 4. ...Rxh2+ 5. Kg1 5. Qg2#

Qh1+ is impossible as mate would have been already delivered. I think I have tried only one or two puzzles at this site, so my puzzle score is based on failing to ignore the only logical move in a position.

Strangemover, I tied in a match with the chess champion of Indonesia. Maybe we sould play a game to see how well your solution to chess puzzles serves in actual play of the game.

The solution has been demonstrated to you by more than one person...Qh1+ wins by force for black. Can you not see even now? How is it impossible because mate would have already been delivered? Every move is with check...

Tied a match with the chess champion of Indonesia? One of the more bizarre and outlandish claims I have heard...If your posts here are anything to go by then there is little point in us playing a game of chess. I do however have every confidence that you would easily defeat me in a window licking contest. 

A forced mate is the solution, not Rb7

1....... Qh1+ is the correct answer. Ask your Indonesian chess champion if you don't believe everyone else on the forum

I just got the solution, it is a forced mate.

Djard007:I tied against the chess champion of indonesia

also Djard007:*chooses to block the checkmate thread and might run out of time or get perpetual checked instead of a checkmate*

I think everyone can see this point over here

also who do you think the chess champion in Indonesia is? Mind sharing the match? 

Sometimes newer players can't spot these advanced tactics. You shouldn't feel bad about it. 

rb7 on the first move hangs 3 m1's

Profile screams "Troll!", but I'll respond anyway, because other chess players display the same kind of attitude sometimes, and maybe somebody will recognize themselves.

Translation:

Some crackpot told you they were the champion of Indonesia.  And you fell for this because you for some reason believe yourself to be someone capable of defeating a national champion.  So, of course, you cannot understand how chess puzzles are always wrong ...

The answer is simple.  They aren't wrong.  You are.

P.S. The next time someone tells you they are a national champion and then you beat them...question their integrity over believing your prowess.

if u drew the chess champion of indonesia, i must be able to beat the chess champion of indonesia. woop woop, now im gonna go represent the Indonesian team in PCL! 

It could have been in a large simul, but yes I agree. Unless youŕe a master, youŕe not going to beat a national champion.

He said in a match.  Though admittedly he might not fathom that a chess match is a set of games, not one game.

When people cannot attack the argument they attack the person. Be nice!

Black queen to h1+ only delays the imminent Qg7# by one move, if rook on b2 is not moved to b7...the only good move for black. Remember that it is black's move, which faces certain checkmate in the next move. In the game, if my critics here plied the back queen on c6 to deliver a check on h1 to my king, I would immediately capture his queen with impunity then mate him freely in the next move. If this explanation is not clear, I encourage you to set up the pieces on a physical board and play the moves.

Black queen on h1 becomes a hanging piece. Why would you not use the white king to capture the black queen if it were moved to h1? 

PS. I won the first game against the Indonesian master because the unorthodox approach I used surprised him (and me!). He cleaned me up in the second game. By then he had my number. I declined his enthusiastic request for a third game, realizing he was a much stronger player. We both had a good laugh.