Chess is a skill based memory game

The more complex the position, the more information you have to remember at any given time, and the more mistakes you will make.  However, if you know the pattern, then you have an advantage over someone who does not.  

There is also the forgetting about a sleeping tactic factor.  To give an example, back when I wasn't really good at chess at all, I played against someone who always started off the game by fiancettoing both his bishops.  He'd win most of his games when his opponent just "forgot" that the bishop was there and lost one of their rooks to a bishop and couldn't even get the bishop back to only be down the exchange.  Of course his opponents were not very good .  Anyway, I've noticed, regardless of how good you are, sometimes, people "forgot" about a tactic that their opponent has, see's another idea, and goes for it, forgetting that he had to devote a piece to defense, or, forgot that he could not push that pawn because it was pinned, etc.  

I once read somewhere in the forums that in order to get really good at chess you'd have to have a good memory.  I'm starting to believe them!  

Any other types of memory that chess forces us to use that people know exists in chess and would like to share?  I listed two kinds.  Any others?

Chess is a luck-based memory game.

What were the two types of memory? All I see is a bunch of gibberish that no one wants to read.

OP - Can you just list them?

I call these observational errors. It's not calculation or knowledge, it's more or less not paying attention.

And sure, there have been very strong players who have done this, but remember for weak players it may be 1 in 5 games, while for GMs it's more like 1 in 10,000. At a certain level your games aren't won and lost by observational errors anymore.

The first part of my post referred to the idea that any given person can only think about 5 to 9 different "objects" in memory at any given time.  There is a way to chunk larger pieces of information into a single object in memory, creating the "illusion" that you are memorizing 20-30 different objects in memory but in reality you are only memorizing 5 to 9 different "objects" in memory, but I am not going to get into that.  How does this relate to chess?  Well, when the chess position gets complex, the chess player has to keep track of several different things, like the pawn that is pinned, or the rook that is attacking a piece, and the fact that your queen is becoming more and more over worked.  The position can be so complex that you might actually have to keep track of about 5 to 9 different "objects" in memory at any given time, or in some cases, more...  What I also mentioned is that often the position is simply a memorized pattern in the chess players head, and in that case, the information is "chunked" and less "objects" are used in memory because of this.  This concept is pretty complex, but to give a list, lets call this type of memory WORKING MEMORY

The other type of memory mishap happens either when the chess player forgets about a certain tactic that was on the board after he came up with a new idea and just went with it and loses material or the game because of it.  This type of memory mishap can also happen by just being inattentive, as mentioned by others in this thread.  Let's call this memory mishaps OBSERVATIONAL ERROR

So the two memory mishaps I was talking about are:

WORKING MEMORY and OBSERVATIONAL ERRORS

I hope this helps.

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