Is this opening good

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6
5. Nf3 O-O 6. Be2 e5 7. O-O exd4 8. Nxd4 Re8
9. f3 c6

@SrikaraSoulOfTal
FWIW. It occurs > 900 times in the Lichess Masters database.
9...c7c6 is the 2nd most popular choice besides 9...Nc6
https:// --- lichess dot org/study/yh1Ce1kk/MYINYiKl#17

@SrikaraSoulOfTal

Your line is OK, but the main line (and by far the most popular) is 7... Nc6, playing a regular KID. After ed4 Nd4, the position resembles a Maroczy Bind structure, but with the black pawn on c7 instead of e7.

While I'm sure you can catch some white playes off-guard with this, the regular 7...Nc6 King's Indian is much better, and much more interesting

but it has lot of theory to learn

@Kryfyre
OP mentioned 6...e5 so there is no pawn on e7 at move 7 or later.

I'm sorry @achja @SrikaraSoulOfTal , I meant c7 instead of e7 ;)

Edited and fixed.

@SrikaraSoulOfTal

Well, then KID is probably not for you, maybe just learn the Slav or something that is less theory-heavy

i am aggresive player i do not like slav or any other such openings i played nc6 but my opponent would be always prepared for it

check chessable free course by kamil plickta well i am not sure should i play it or not so i posted in forum

7...exd4 instead of 7...Nc6 is fine and used to be preferred by Bronstein and Dorfman
When Kasparov and Radjabov turned away from the King's Indian Defence, they turned to the Queen's Gambit Accepted