FrenchRefutes1e4 wrote on 09/26/17 at 02:56:15:
Nowhere did I say I was willing to "sacrifice a Rook" in the Fianchetto Variation. This isn't the classical where the Rook on a8 is totally useless. I said I'd be willing to allow Qxa8 if there is a legit way to trap the Queen! That would be a combination, not a sacrifice. Similar to what White does in some lines of the French where the Queen takes on b2 and a1, but later gets trapped by force, and so it's not a "sacrifice", it's a "combination".
Your own words were:
FrenchRefutes1e4 wrote on 09/25/17 at 15:42:23:
play 8...Be6 with the Rook sac line against 9.d5 where you take on d5 and again on c4, allowing Bxa8...
I didn't quite know what continuation you were talking about, but you did say "Rook sac line," not "combination where you win White's queen," so it sounded to me as though you were prepared to play a true sacrifice against another of White's continuations.
FrenchRefutes1e4 wrote on 09/26/17 at 02:56:15:
Secondly, about the Bishop, trading Bishop for Knight in this line is NORMAL! Black, under normal circumstances in this line, trades the Bishop for the Knight on f3 and follows with ...e5. The reasoning is simple:
1) It keeps the White e-pawn on e4, blocking his Bishop
2) Black gains ownership of the dark squares in the center. Particularly d4 and to some extent c5.
I understand that much, but Black would like it if White at least spends a tempo on 9.h3 before capturing the knight.
Anyhow, I think that it's pretty clear that after 9.Qb3 Bxf3 10.Bxf3 Qc7 11.Be3 White is better. You have to go back a couple of moves to find Black's mistake, and while perhaps the immediate capture on f3 isn't so bad, there's just no need for it--unless you're worried that after ...Nbd7 (closing the retreat path of the bishop) White can move the f3-knight and chase down the bishop on g4, but in that case the immediate 9...Qc7 would be better than capturing on f3 and then retreating the queen.
Ideally Black shouldn't do any retreating, can we agree on that? The second move that comes to my mind here is 9...Nbd7 as mn pointed out; the first is actually 9...Na6!? because I'm slightly concerned that the bishop on g4 could be hunted down in the future. These are the first two moves to analyze. If you're concerned about saccing a pawn, I would argue that 9...Qb6 is a better way of protecting it, since Black has a minor threat of capturing on b3 with control of the b4-square. For instance 9...Qb6 10.Be3 Qxb3 11.ab Na6.
Still, I probably wouldn't seriously consider 9...Qb6. You just played 7...Qa5 and 8...Bg4; if you believe in your scheme of development, you need to continue playing logical, foreword, "get your pieces out quickly" moves and not worry too much about the b7-pawn. Frankly the move 9.Qb3 is so obvious that you should have the confidence that it doesn't work for White, because if it did, no strong players would use this scheme of development for Black. That's not to say that White can't hold onto a small edge after 9.Qb3, but you should realize that it's nothing to worry about and go from there.
I still question whether you're thinking too much about precise theory or "playing King's Indian-type moves" (such as ...Bxf3) and not looking at the position afresh and asking, "How can Black best solve his opening problems from here? What is Black's most logical continuation given his previous moves?"