If you wouldn't mind, I'd be interested in getting feedback about this game, in particular, the correct follow-through at move 17 and onwards.
Let me analyze your games!
I just got here and I'm giving it a go at analysing plotsin's game since I got nothing to do.
2. exd5 Qxd5 3. Nc3 Qa5 loses a tempo for development. Just saying.
2. Qh5? is definitely a bad move. 3. Qe2 loses a tempo and blocks the light-square bishop.
3. ... Nxe4 4. f3 Ng5 bad move. 5. h4 Ne6 blocks development. 3 ... dxe4 is fine.
5 ... Qd6? what is this supposed to do?
9. ... Nc6 10. f4 Nd4 attacking the White queen to make it leave. 11. Qe3? (likely) Qb4+ 12. Nd2 Qxb2 13. Rb1 and White is crapped.
16. Qb5+ opponent's waste of tempo and mistake.
24. Kf1 could have been better.
After 40. b4 the game is finished.
41. ... Bd6#. Missed that. Nice checkmate.

If you wouldn't mind, I'd be interested in getting feedback about this game, in particular, the correct follow-through at move 17 and onwards.
Sorry, took me so long..But, 17 bxf6, gxf6 (if black tries q-e3+ and then taking then don't take the pawn on f6 but just play r-f3 again and the king is still in grave danger) 18 r-f3(threatening r-g3 obviously but also taking over the dark squares around the black king and white should be well on top. Don't forget you can bring the knight around to attack those dark squares as well.

I just got here and I'm giving it a go at analysing plotsin's game since I got nothing to do.
2. exd5 Qxd5 3. Nc3 Qa5 loses a tempo for development. Just saying.
2. Qh5? is definitely a bad move. 3. Qe2 loses a tempo and blocks the light-square bishop.
3. ... Nxe4 4. f3 Ng5 bad move. 5. h4 Ne6 blocks development. 3 ... dxe4 is fine.Agree with everything so far...However nxe4 isn't bad either...Simply retreat to f6 though.
5 ... Qd6? what is this supposed to do? This hangs the knight-don't do that.
9. ... Nc6 10. f4 Nd4 attacking the White queen to make it leave(not true-fxe5nxe2 exd6 and white is slightly better. although after f4 simply e4 and black is fine+
). 11. Qe3? (likely) Qb4+ 12. Nd2 Qxb2 13. Rb1 and White is crapped.
16. Qb5+ opponent's waste of tempo and mistake.
24. Kf1 could have been better.
After 40. b4 the game is finished.
41. ... Bd6#. Missed that. Nice checkmate.
Made some notes in bold...Some additional notes..qb6 is a good idea because it forces g3..But, the aditional weakness forced by q-d4 is not good enough as the loss of time on your queen imop(your king is still in the center. I prefer either b-g7 or b-c5.
21 qxe2 this loses an exchange(rook for bishop-bishops are not as good as rooks in general) Maybe you thought you were winning it. But, the defender has 2 guarding and you only have 2 attacking. You need more attackers than defenders to win the piece.
31 ne4?? and 32 rxe3 give the game to you....
after 33. r-d1 you should xchange off bishops. The more you exchange the more pieces you exchange the more powerful your extra piece will become
A nice mate at the end...you could have mated with r-a2 and bd6 mate as well
Nacht, when you're up a pawn with a clearly better position like that, it's not specific bad moves that lose positions, it's bad ideas. Here are a few things that I noticed, although I admittedly only started on move 17 and my points will probably be refuted by silicon:
17. Bxf6 and black is basically lost - down a pawn and with a wrecked pawn structure. 17. Rf3 is clearly misguided and either allows black to play Bg4 or forces white to weaken his kingside with h3 (as happened in the game).
From an intuitive standpoint, 18. e5 looks like a concession - white opens the a8-h1 diagonal on his king and blunts his bishop in the process, which is probably what black wants. I think that 18. Qf1 looks a lot more logical - if black tries to connect his rooks, white can play Bc5! renewing the pin. Also note that if black plays b6 white can play Qf2 and Rf1. It's very easy to get into an attack and defense mindset where you're simply responding to your opponent's moves instead of trying to attack the weaknesses he creates, but it's a dangerous road to go down.
21. Be3?! ties white's pieces in somewhat of a knot and blocks the e-file. The bishop would still be passive but would probably be better on b2 defending the pawn, after which white could play for Rae1 Nc3-d5.
22. Ng3?? This is a very serious mistake that shows that white is not actively taking the demands of the position into account. White is up a pawn, but is defending his weakened kingside and is somewhat passive - your move 22. Ng3 both gives the pawn back and gives black a dangerous initiative due to the opposite colored bishops. Remember that opposite colored bishops in the middlegame do NOT increase drawing chances and instead make initiatives stronger and trades more difficult to come by. I can't see any good moves for white, though - the best I see is heading straight to the endgame with 22. g4?! fxg4 23. Rxf8+ Qxf8 24. Qxf8+ Kxf8 25. hxg4 Bxg4 26. Nf4 Nxf4 27. Bxf4 and black has an advantage, but white may be able to hold.

Thank you very much erikido23 and NimzoIndianDefense for the feedback. I found all the comments and ideas extremely helpful!

WELL HERE ONE FOR POINTING OUT MY ERROR IN THIS HEAVILY BLUNDERED GAME ... WHAT COULD BE THE BETTER MOVES AND WHAT WERE MY BASIC MISTAKES

WELL HERE ONE FOR POINTING OUT MY ERROR IN THIS HEAVILY BLUNDERED GAME ... WHAT COULD BE THE BETTER MOVES AND WHAT WERE MY BASIC MISTAKES
Just analizing your game won't help you if you don't know the basic. Well I mean the Opening, Middle Game & End Game. Basic idea what to do. Just surf the net & find out the basic you should do during that 3 stages & when does that 3 stages starts. Then from there go to chess tempo & practice unlimited tactics. Find out what type of tactic are there e.g x-ray attack & etc. That should help you. Once you undertand these things then you can start analysing your games. Well this is just my humble opinion.
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