What did I really skipped in Middlegame to get real advantage?

I don't get it , middlegame is always a mess for Me somehow

"middlegame is always a mess"

• especially in blitz.

@tpr said ^

"middlegame is always a mess"

• especially in blitz.

I don't believe like it's the case, I think I really skip something important in that stage,like My ability to calculate is falling down for some reason, except most quantity of figures on desk with many combinations. In beginning there can be less combinations, and middlegame requiers more orientation and attention and understanding in some way

Don't waste your pieces. You made three moves with your bishop and exchanged them for knights. For what? No reason. Didn't get any benefit.
Save the pieces, then you will have more chances to create combinations.

@RemRus said ^

Don't waste your pieces. You made three moves with your bishop and exchanged them for knights. For what? No reason. Didn't get any benefit.
Save the pieces, then you will have more chances to create combinations.

what do you mean? I trade because I found that knight can bring danger in future, and my bishop is too useless. also My rating is higher then yours, so I may have more experience in that

"middlegame requiers more orientation and attention"

• and thus more time.

(@)RemRus: 'No reason.' ~ There is always a reason for everything.

(@)aVague: 'also My rating is higher then yours, so I may have more experience in that.' ~ Firstly, the, 'm' in, 'my' is not capitalized, and you used, 'then' instead of, 'than.' Before stating that you are not worse at English than I am, you should fix that.

Secondly, lower-rated players should not be discouraged from giving higher-rated ones advice. Worst case scenario, what they state is incorrect and there can be discussion about why that is. The more discussion, the better; forums are for discussion, after all.

Thirdly, while you do have many more games played than RemRus, you do not use your time, so your, 'experience' is shallow at best.

Hi, you play the London System, but you don't know the opening ideas and variations! Try to study it better, for example how to play the London System against setups where Black played the g6 pawn.

"opening ideas and variations"

• Taking a free bishop 15 Nxd3 helps.

The London bishop is an IMPORTANT bishop! It needs to be stored and used. Yours bishops must become dangerous in the future.