Good luck in chess?

What part has randomness and good luck in chess? How many procents it deal with the results?

Ok, as a novice i believe you. Then what part has mental situations? I mean you have bad days and good days. Sometimes you are tired and makes mistakes. Sometimes you have eaten and slept well and feel full of energy.

randomness is where you can't figure out why things went the way they did, so you lump it together with similar stuff and do stats and prob on it. Luck is where things go well for you from an apparently random perspective if you cant figure out why. that was for free.

So you never had have situation where you can't decide by analyzing which move from two you should choose?

So you didn't know beforehand which was better. You choose bad, you have bad luck and you choose good, you have good luck. I call it randomness factor and bad luck and good luck. Same as in lottery.

Randomness has its part in chess. We win or lose because of mistakes made. Some of mistakes are systematic (not random) - they are made because of poor knowledge. For example if I don't know the opening I will probably misplay it, even more so with endgames because precision is more important.

However some mistakes are random. When I know the tactical pattern but fail to see it in this specific position - that's random. When I have to calculate a long line it can go right or wrong - especially given the time limitations. When I play by intuition - it's random.

Nobody can predict the outcome of those mental processes (seeing a pattern, calculating a long line, intuition). What can't be predicted is random. However we can talk about probability of making a mistake - for a stronger player this probability is lower.

petrikeckman, I guess u r mixing randomness in the game, and randomness or "luckyness" in ur moves. If the game has randomness u can't say which move is better. That's not the case. Begginers like me tend to commit lots of inacuracies and blunders, so u can make some bad moves and still win. That's not randomness in the game, we just don't know well what r we doing.

The Big Masters also do not always know well enough what they are doing. If they knew they should always win or white side should always win.

Guys, we are all just patzers arguing with each other. We need some titled players to give us advice here :p

There is a little theoretical possibility that monkey who have been teached make  chess moves that obey rules can randomly win you. He (It) can have good luck. It is theoretical, but it is not zero.

You absolutely right, but i'm too old and lazy dog to learn something new. That's why I only shit chat in here forum.

I heard Kasparov once said "the biggest mistake the a player can make is the lack of good luck" :P

Being serious tho, luck does exist to some degree other than the usual factors outside of the board (opponents getting sick during a tournament).

An example is sometimes playing into a variation thats quite unclear to both player's calculation but everything working out from the geometry of the pieces. Or playing a certain variation, then finding a win at the end, even though you didn't originally see the line or intend it to work out like that. Or even getting into variations where both players miss some small subtlety thats too deep for humans to see that change the evaluation of the position or somehow saves everything for one side. It's quite hard to conceptualise this form of luck, but its definitely there.

I guess it depends, as it so often does, on a definition. There is not luck in the sense that luck occurs in poker, etc, where you can be way behind and an outside force (the dealer) gives you the one card that completes your hand. But there can be luck in other ways:

You make a move thinking you are creating a small threat and you actually find a completely winning move that you didn't see before you made the move. I have had opponents resign and it took me a minute to see why the seemingly innocent move I just made actually wins a piece or threatens unavoidable mate.

You have a lost position and your opponent completely misses a win and hangs a piece. This is not luck strictly speaking because it is a lack of skill/attention on the part of your opponent, but it sure feels like luck to when it happens in my favour. 

there are probably other examples too.....

Luck in chess is getting a worse opponent

it's also very good luck if you are in a lost position but suddenly some crazed lunatic starts shooting up the playing hall and your opponent gets hit by a stray bullet.

As I heard from a GM, luck is a factor. I watch Millionaire Chess lately, the commentator GM Hess mentioned that Ray Robson was very lucky in his games. GM Hess even looked so pleased when he saw Ray finally lose a game xD.

 It looks like recent article  Why Chess Players Blunder   confirms what I was trying to say about luck and randomness in chess.

A part where intuition precedes logic?

Yes intuition is one source of randomness. Vision is another. Like seeing or not seeing tactical patterns.