Suggestions on Game Analysis

 
Bharat
Singa
Bharat
Singa
1
d4
d5
 
 
2
Bf4
f6
 
Inaccuracy(may be for capturing Bishop,planning for g5)
3
e3
g5
 
Inaacuracy
4
Bg3
h5
Bishop back is inaccuracy. Engine says give check to take his castling move out of question. 4.Qh5+ Kd7 5. Bg3 Qe8 5. Qd1... Is actually the best combination for black 
Plan continues to capture bishop
5
h4
g4
Only good move
 
6
Bd3
e6
 
 
7
c4
f5
 
 
8
Ne2
c6
 
 
9
cxd5
cxd5
Why it's an inaccuracy? Engine says Nbc3 first
 
10
Nbc3
Bd6
 
 
11
Nf4
Ne7
Didn't want to exchange bishops
 
12
Qb3
Qb6
 
 
13
Na4
Bb4+
Blunder,  more in terms of what I missed I in improving my position!!! Any suggestions..Nb5 is best attacking bishop, and if bishop doesn't capture my other knight. I will capture his bishop and when queen recaptures. I will play Ng6. Alternate ways are also good
Mistake! Time to do some development achieves nothing 
14
Ke2
Qa5
 
 
15
Rhd1
Bd7
Inaccuracy
 
16
Nc3
Ba4
 
Blunder.. Giving me a piece
17
Nxa4
O-O
 
 
18
Rac1
b5
 
 
19
Nc5
Rc8
 
 
20
a3
Bxc5
I can see other moves, but wanted to simplify.. Trapping his bishop
Forced
21
Rxc5
Rxc5
Can capture with pawn but I can see e6 pawn is hanging and I don't want a free rook  on last rank  somehow coming into picture
Forced
22
dxc5
Nbc6
 
 
23
Nxe6
d4
 
Blunder, opening way for discovered check
24
Nc7+
1-0
Lost forced checkmate sequence
 

Please help with explanations on move 9, 13(i have provided an explanation). And any other things which you noticed, for game improvement. Thanls

Hi. I think 9 was just hold the pawn tension and develop a piece. If dxc, then Bxc4 and your bishop has a long diagonal attacking the weak e pawn. For 13, the computer line was to trade queens which hangs your opponents good bishop, then go after it via Nxd5 discovered attack. Notice Nxd5 threatens a couple of forks. The exchanges give you a huge lead in development and exchange off your opponents good bishop for your bad bishop. A bad bishop is on the same colour squares as your central pawns or majority of pawns, so has poorer mobility. A good bishop is on opposite squares so is more mobile. Your opponents LSB is a poor piece. Exchanging queens and double ling pawns on the b file makes it even harder for them to get it out. I'd probably castle to swing both rooks over to the queenside and get control of an open file.

Thanks Mark