Punishing purposeless moves.

http://en.lichess.org/analyse/7tmc2g9l/black

White has a significant rating advantage over me, so they can't claim I'm victimizing some weak patzer. I think the game demonstrates why you have to have a real plan and play with some degree of
focused attention. Because if you don't your opponent easily takes the reigns and takes control.

For example, 7. Nb5? what is this move accomplishing? Allowing me the trivial response 7. ... a6 will clearly allow me to play ... b5 some time in the future for free, and basically gives me a free
tempo with which to respond to his retreating knight. Morphy would be unimpressed.

10. h4 looks aggressive, but is ridiculously superficial. I have a knight and pawn defending h5. Does he really think he can play a real K-side attack against me there? This basically signaled to
me that he intended to castle Q-side, so I decided to kill two birds with one stone: 10. ... Bg4! now castling Q-side is met by Nd4 and followed by b5. And he's definitely not playing h5 now.
White's position already looks a bit unsound.

11. a3? is an attempt to make a cubbyhole for his white bishop, which is always annoying. I hate those cubbyhole bishops, so I found a simple tactic to prevent it and further ruin white's position.
White is left with two doubled pawns and no cubbyhole bishop for his troubles.

My move 15. ... Qd7?! was a bit careless on my part. I didn't even consider that I was just giving up the b6 square for his knight. Fortunately I was able to patch it up after 16. Nd5 Rab8. My
higher rated opponent didn't want a draw, so he didn't go for Nb6 Qc6 Nd5 Qd7. But 17. o-o-o? is just suicide. He has no chance on the king side, the e5 central push is guarded, my bishop is already
aimed at his Q-side, and b5 is obviously coming.

19. Rb1 is just delusional. My attack is coming and no his Q-side not well guarded. 21. b3? is really weak. It stops Qa4, but not 21. ... Qa7. Now my black bishop is participating in the attack
for free. On the other hand I don't know if he has any defense at this point anyway.

22. ... e6 was just a clever way to finish him off.

Any thoughts?

Nice analysis. I can say I learned a thing or two.

And I agree with most points; I do have to wonder why people with more high ratings, miss some critical points. The 10.h4?! thing you mentioned seems to be a very common rumor around opponents on
this site. In fast games, of course, many players will, irregardless, push h2:h4:h5, after ...Nxh5, then Rxh5 g6:h5 and play for some second Kingside sacrifice and hope to overwhelm. Many beginners
here seem to have overly fixated ideas against the King's Indian structures instead of ...e6 or ...e5.

I was just thinking, since you had more than enough power against b2, on 20...cxb4, I guess if you can't get away with sacrificing with 20...Rxb4, why block the road with 20...cxb4? I would take a
small opportunity to throw natural responses off guard with 20...e6!? to chase White's knight away.

20...e6 21.Nf4 allows you to exchange your sealed-up knight on h5 with his active, more aggressive knight.
20...e6 21.Nf6+, Nxe7+, Nc7, and Nb6 all lose a piece.
21.Nc3 is retarded. Maybe 21...Bxc3 or 21...Rxb4, threatening a rook sacrifice: ...Rxb2!? Kxb2 Qb7+, winning the knight with ...Bxc3 and threatening ...Qb2# almost inevitably.

After perhaps the safest 20...e6 21.Ne3, then I guess 21...Rxb4 is simple enough. Maybe I look at sacs too much lol

Rest of your game looks great. I hate to admit it but I seem to instantly rust my chess as I dedicate time as a software engineer.

Oh and, one alternate to 15...Qd7 is 15...b5?! 16.cxb5 axb5 17.Qxb5 Rab8!, gambitting a pawn to open both your queenside and your attack on the safer half of White's pawn foundation and remote chances
of castling.