Chance doesn't exist, so in theory, luck doesn't exist either. Everything follows an inevitable order in the universe.
But we still use the term "luck" to refer to the fortune someone has had in winning a game.
You could say, "But he's more skilled, that's why he won," but skill is also a form of luck. It's like with beauty someone who's good looking has luck, just like someone who's not.
No, chess is a game of skill with a very small element of chance.
Negative, what you call skill is just the luck of having a brain or genetics better suited.
When two players are at a similar level, the result is said to be 50%, like flipping a coin. But this is actually an illusion because the outcome is already determined in time. Therefore, one player always has a 100% chance of winning or losing that game.
Yes, in time, as the game is being played. The game is not decided before it starts.
And anyway, at any given moment, the player with the “better chances” might blunder, so it’s impossible to truly have a 100% chance of winning.