To improve, you need to become an expert, not about
about your chess. You need to know what there is to be good at,
and what you are good at, and what you are not good at yet.
Practice helps. Books, databases, analysis
especially going over your own games also help. I always type my
games into a computer and I always wince to see what tactics I've
missed. I also enjoy some of the computer's suggestions about
alternative moves: sometimes they're real crackers, even if there's
nothing in it by way of winning a piece or pawn.
But it does help to show your games to other people. If they are better players than you, so much the better, but even if you are of similar standard, they will be good at different things than you, and are still likely to be able to make some useful comments.
Also: Donald Rumsfeld, you may recall, got into a lot of
trouble for his apparently confused remarks about "unknown
unknowns". [It was about the only thing he has ever said
thought made any sense.] I was familiar with the idea from the
a way of picturing self-knowledge devised by a couple
of folks called Jo(e?) and Harry.
|What other people know about me||What other people don't know about me|
|What I know about myself||A
|What I don't know about myself||C
So, there are things I know about my chess that others
(B), and there are also things I don't know about my chess that others
But there are also things hidden from us all -- perhaps
because we have never heard of them (D). So, everyone knows I
used to play the Modern (A), I know I used to get a rotten score with
it but others don't (B), others may notice that I don't handle Rook
Endings very well (but I haven't noticed) (C), and there may be
something glaringly obvious to a GM (like, I always choose the wrong
plan in the English Opening) which neither I nor anyone else at the
club suspects (D), the unknown unknowns.
So, the benefit of showing your games to others, in this
scheme, is holding up a mirror to sides of you that you cannot
see (C). And the first step in curing a fault is identifying it.