If it can be attributed to a human failure somewhere, it isn't luck. Just to clarify that before you claim, "Messi was sick, so other team got lucky," or, "it rained and I didn't wear the proper boots and I slipped, so that was unlucky."
Is there such thing as "luck" in chess?

There is a lot of luck in soccer.. just like there is a lot of luck in chess. Here is an example (search for BEACH BALL GOAL Liverpool against Sunderland). Unfortunately I cannot put youtube

Saying there is luck in chess is like saying there is luck in soccer. Sure, I might be lucky the last defender passed the ball to me and I scored off it, but that's a mistake they made. Same thing in chess. If my opponent makes a blunder or doesn't see my plan until it's too late, it's not luck. What some of y'all are calling luck is the culmination of studying, preparation, mental and physical health, amount of sleep, nutrition, and ability to focus. If one opponent lapses in any of those areas and loses because of it... To call it luck is incognizance.
There is luck in soccer. Not just the examples given so far, but there are a lot more examples too. There is luck in chess also.
A reasonable example of luck in chess is when a move is made randomly. No intention, plan, or foresight put into the move. Just moving a piece because it happens to be a legal move. The result of that move is luck, since all the things you mentioned were not part of the move.

Got an example of luck in soccer?
One famous example: Maradona's "hand of God" goal that helped eliminate England in the 1986 World Cup quarterfinals. Clearly a handball, but the referee had a bad angle and didn't see it and there was no video replay at that time. Good luck for Argentina, bad luck for England.
Of course many goals have been scored when a player (teammate or opponent) had a shot or pass deflect off them when their back was turned, turning an easy stop for the goalie into a (un)lucky score.

Got an example of luck in soccer?
Better just take my word for it, since you obviously never played.
Played soccer for 22 years, but sure, go off. Post an example of exactly what I said - human mistakes and decisions are not luck.

Saying there is luck in chess is like saying there is luck in soccer. Sure, I might be lucky the last defender passed the ball to me and I scored off it, but that's a mistake they made. Same thing in chess. If my opponent makes a blunder or doesn't see my plan until it's too late, it's not luck. What some of y'all are calling luck is the culmination of studying, preparation, mental and physical health, amount of sleep, nutrition, and ability to focus. If one opponent lapses in any of those areas and loses because of it... To call it luck is incognizance.
There is luck in soccer. Not just the examples given so far, but there are a lot more examples too. There is luck in chess also.
A reasonable example of luck in chess is when a move is made randomly. No intention, plan, or foresight put into the move. Just moving a piece because it happens to be a legal move. The result of that move is luck, since all the things you mentioned were not part of the move.
So now bad decision making is considered luck?

Y'all probably think the guy at work getting the promotion over you is lucky too, since your boss's point of view is different and therefore not within your control.

Got an example of luck in soccer?
Better just take my word for it, since you obviously never played.
Played soccer for 22 years, but sure, go off. Post an example of exactly what I said - human mistakes and decisions are not luck.
I'm sure there are many hundreds of examples, but one would be a kick that is offline and will not score. But the split second after contact is made the swirling wind shifts dramatically and pushes the ball back toward the goal. Instead of missing, the ball now hits the bar and ricochets into the goal. Swirling, ever changing, unpredictable wind is luck.

Saying there is luck in chess is like saying there is luck in soccer. Sure, I might be lucky the last defender passed the ball to me and I scored off it, but that's a mistake they made. Same thing in chess. If my opponent makes a blunder or doesn't see my plan until it's too late, it's not luck. What some of y'all are calling luck is the culmination of studying, preparation, mental and physical health, amount of sleep, nutrition, and ability to focus. If one opponent lapses in any of those areas and loses because of it... To call it luck is incognizance.
There is luck in soccer. Not just the examples given so far, but there are a lot more examples too. There is luck in chess also.
A reasonable example of luck in chess is when a move is made randomly. No intention, plan, or foresight put into the move. Just moving a piece because it happens to be a legal move. The result of that move is luck, since all the things you mentioned were not part of the move.
So now bad decision making is considered luck?
Yes. good decision making can be luck also. Because at the time there is no way to know if it's good or bad. For example, I make a decision to pick 6 numbers for the lottery. Only after the lottery results are finalized will I know if the decision was lucky or unlucky. If I make a truly random move in chess, with no plan, no motivation, no intent or reason I won't know if it's lucky or unlucky until later in the game.

Nonsense. Consider two players staying at the hotel where a tournament is being played. One player takes the stairs down to the playing site, the other decides to take the elevator, which gets stuck and causes him to lose on time. You may say it was the elevator malfunction that was unlucky for player #2, but it was his decision to take the elevator. And the chess game was decided by luck in any case.
All players, even world champions, sometimes make patzer-quality mistakes. Should strong GM make a gross blunder in a simple K+P ending and turn a simple win into a draw or loss, that is a mistake on their part, causing a poor result. However, the opponent's play merited a loss, but his opponent made a mistake we all realize they would avoid 99%+ of the time. The opponent was indeed lucky to be the one player in 100 that got the benefit of the error.
If it can be attributed to a human failure somewhere, it isn't luck. Just to clarify that before you claim, "Messi was sick, so other team got lucky," or, "it rained and I didn't wear the proper boots and I slipped, so that was unlucky."
If you ask a person to flip a coin and try to make it land heads up, the result of the coin flip is completely attributable to the person's "failure" or lack thereof in flipping the coin. If it lands tails, they could have flipped it some miniscule amount softer or harder and gotten the desired result; i.e. it was a "human failure somewhere".
So do you think that flipping a coin has no elements of luck?

Y'all probably think the guy at work getting the promotion over you is lucky too, since your boss's point of view is different and therefore not within your control.
There is an amount of luck involved and also an effort from employees that affects the promotion decision. The boss might have a random preference of blonde girls and other employees who dont fit this criteria are in a disadvantage. This is luck.
In soccer a player tries to cross the ball to their teammate, but fails, misshits the ball and it bounces off a defenders butt in the goal. Some amount of skill is involved but also luck. Thats that.

How do I know you were no good? It's because you need flair to be a good football player. Going through the motions of doing everything just right is not enough to make you anything more than safe and rather pedestrian.
A good team needs players with a mix of attributes, including those that do the simple things well and give the ball to those with more skill.

Here are examples of luck in football:
Beach ball goal
Robbery of stanford bridge
Robben cheat against Mexico
Unfortunately images don't work. But all examples are BAD REFEREES that cause luck.
Just like in chess, when my internet disconnects. Is that luck? Or skill?

Got an example of luck in soccer?
luck in soccer is obviously far more common and likely than in chess bc in chess there are 64 different places a piece can be, whereas in soccer, they can be anywhere. they can walk off the field, they can get subbed off, they can get a red card, they can play way out of position, etc.
when people and physics* are together in a game, luck is a factor.
*physics controlling the ball
Got an example of luck in soccer?