Yes, it is a mistake; but, it does not feel like a very natural move to me. Such a move without clear reason for it is asking for trouble. It is clearly out of character with the hedgehog defense...which I deem this opening to be. The double fianchetto variation is closely related to the QID but not quite the same. Not being able to identify this is probably why black may have thought 6...c5 was an OK move. Regardless, white played well in this game. After analysis, I could only find significant improvements and better alternatives for black.

You are probably right.

Good move !!

I now agree. Black's 6...c5 move took his game out of hedgehog and into a bad variation QID for him.

I disagree with that suggested alternative. Black's play here was best; but equally good was O-O. It's obvious that he is going to castle Kingside anyway...why not do it now? He needs to catch up in development ASAP.

9...Bc8 was perhaps a little better. Control of the c8-h3 diagonal prevents white's knight invasion through the f5 point.

Black should have seen the white knight coming to f5. Good move on white's part.

On the contrary. This is an excellent move. It provokes weaknesses in black's position. The best part about the move is how sneaky it really is. Once black sees h6, he will think it was a bad move on white's part. If this were still part of the opening proper, then the forced additional moves would be likely spell disaster for white. But this is clearly the middle-game. The readjusting of the bishop turns out to be positional play. The multiple moves does not really matter. And white played it perfectly.

Thanks!

You are correct. The 13 Bf4 played to provoke Ng6 and slightly weakened black's position further.

Good planning.

No way! As played it gives you more flexibility.

This is really a deceptive move on black's part. It looks a little weak; yet white cannot improve his position against it.

Well, it was an OK move perhaps even good. Sometimes preventing threats, even though they are never actually played, is a good move. Black has a 3 to 2 pawn majority on the queenside. If black plays for a pawn storm, then it will fail because of the added protection of c3. This is something very advanced and most players would not even think about it this early.

And here comes the pawn storm...doomed to fail.

If it is a race, then white has the much better target.