Need deeper explaination for this game (~1300 elo)

This match would've gotten me to 1300 elo, but I lost it. I'm learning how to calculate better and I did my very best, but something didn't go right. The reason why I am creating this thread is that after the analysis I don't understand some of the missed concepts and I would appreciate if someone else explained what went wrong there too, as well as how can I avoid making these mistakes in the future.

I added the game and comments that explain my processing during the game. Thanks for any feedback in advance.

You annotated a lot (which is great!), so I'll just comment a few moments.

9...c4? This move is a positional mistake for the opponent. Your comment mentioned strengthening the pawn chain. Did you mean c4 and d5 together? This is not stronger. Pawns are best next to each other with the ability for either pawn to advance one square and be defended by its neighboring pawn. The ...c4 move is a mistake here because it gives up the tension in the center and once pushed, then black never has the option of ...cxd4 and white maintains better central control.

18. Rac1? You were on the right path, but Rfc1 was best because it has the benefits of your move, but a2 remains defended.

21. Nf4! was strong because it attacks d3 and hopes to pressure the outposted bishop. The engine continuation also avoids losing material from the c2 knight fork. The line goes 21. Nf4! Nc2 22. Rxe8 Rxe8 23. Rd1 (again, chosen to pressure the d3 bishop).

24. Rd1 would pressure the d3 bishop and Rc1 would be a fine alternative too. Playing Rb1 (as in the game) looks unecessary because it walks into the bishop discovered attacks after something like an immediate ...Nd4.

I hope that helps

Thanks for your feedback.

Is there any way I could avoid making these calculation mistakes? I've learnt that I should focus on making attacking moves and trying to go into the enemy's territory if possible, and I knew that the opponent should do the same so I have to predict these moves. Honestly, from just that tip alone I felt more confident at calculating positions, but I may have forgotten about how to defend in a losing position. Maybe you know someone who made a great video about improving calculation in chess?

Here's another match that I've played today. COMPLETELY fumbled the midgame here. Same question as before, I'd really appreciate if someone explained to me missed concepts along with how to avoid making these mistakes. I might dedicate this whole thread for my lost matches.

Thanks in advance.

I don’t have time to go into the game in depth but The reason why 26…Kh8 was better is that after 26…Kg8 you can play 27.Bxd4 Qxd4 28.Re7 which wins. 

But in the similar position with his king on h8 he can check on d1 with his queen, then after Kg2 (your only move as Kh2 Qd6+ hangs your rook) he can check again on d5 followed by bringing the Q back to g8 (that square now being vacant) which holds the position together for him - just 

Actually having checked my previous comment with the comp to make sure it was correct it points out he can also just play …Rg8 as well - but either way …Kh8 is to be able to defend the g7 square more easily.

Calculation is a skill and something which you gain through pattern recognition (solving puzzles and playing games) and through conscious calculation practice (especially endgames or endgame studies).

Feel free to check out my YouTube channel for any chess topic. As for calculation, I have at least two videos you may be interested in. The first one is the "secret" to thinking 10+ moves ahead and the second one is my recent video on puzzle rush, so puzzles like in the video may help your calculation practice:

Ok

I need urgent help. I miraculously drew an extremely long game (90 moves!) and I need explaination on this game; same deal as before, I probably missed some concepts along the way and I'd really appreciate if someone explained it to me (I added my comments as my processing thoughts).

And most importantly, how can I avoid losing pawns in endgames? Or overall, how do I avoid losing pawns? It's my biggest weakness and I struggle to fight it.

Another drawn game. The position looked fairly good throughout most of the match (and was fairly balanced), but both of us ended up getting a terrible % accuracy due to last 6-7 moves. I added comments to this match and I'd appreciate if someone explained what I missed here.

You seem aware of all of your mistakes! Why you cant win?? Who knows how to win without a tactical blow!! No one can win without tactics!!

Man, if you analyse like this, I reckon you'll become a titled player...

Oh, titled player analysis is WAY more in-depth than this lol. The thread OP analyzes similar to how I used to when first starting out. The quality effort displays a desire to learn and almost certainly will translate into improvement, but the level of titled players requires significantly more than just in-depth analysis.

Game 1: 10.e4 is strategical error, seriously weakening your d4 pawn, and you eventually paid for it. In such pawn structure, you are supposed to play b2-b3 fighting blacks pawn chain.

Game 2: 13...Ne4 is a blunder not only from tactical point of view (Nxe4 just wins) but also from strategical point. You shoul have castled way before move 13.

Game 3: 15...f5 is strategical blunder, fataly weakening you pawn structure (e6 mainly). The rest of the game doesnt matter, you just cant play moves like 15..f5.

Game 4: Actually an interesting game. At the very end, instead or repeating moves, you should have played 27.Qd3 with two ideas: Rai Qb3 Nd2 trapping the queen and Ne4-g5 with kingside attack. Engine evaluates position as winning for white.

I bielieve you should study some annotated games of old masters to build an arsenal of strategical ideas. The names which first come to my mind are Morphy, Tarrasch, Rubinstein.

Good luck in your chess progress..

Hello, again! It's me, one month later. I should rename the thread to ~1450 elo or slightly higher.

Anyways, I wouldn't be posting a won match if not one fatal blunder at move 12. I was surprised by how the opponent managed to create deadly threads after this move which seemed normal to me.

I added comments that illustrate my thinking process. The question is... well, I don't have proper ideas. How about this: did my thinking process make sense, or did I miss some concepts?

(At the time of writing this message, I forgot to add some notes: on move 15 for white, I expected Bf5, however that's a mistake due to... just Bxg5. At move 17, I calculated the following: 17. Bf4 Bh4 18. Nxh5 Rxf4 19. Ng6. At move 18, I found Bg6 right away, which double-attacks my rook. Finally at move 23, I expected something like f4 or f3; I didn't expect my opponent would miss the backrank mate...)