That kind of openings are all about sex I think. The player with white had been a terrible fight with his valentine last night and the fight with a woman always paralyses the brain.
Modern opening (1.g3 1.g6)

U are FM and wonder what's the pointof g3?
g3 is a good move : developing (with Bg2 next).
Black can occupy the centre with e5/d5 but it is just an "hypermodern" opening : the idea is to guard central squares at some distance.
Then white will react : c4, e4, or other, later.

As @poucin said it's an hypermodern opening, white plans to control the center squares with the minor pieces and try to undermind blacks central pawns attacking them later.
Perfectly fine opening.

One chess author described 1. g3 as one of six "perfect" first moves. It's only drawback is that after 1... d5 you don't get the immediate pressure against the Pawn on d5 as you do after 1. d4 (1. d4 d5 2. c4) or even 1. Nf3 (which is centralizing enough so that after 1.... d5 White can follow up with 2. d4 and 3. c4 transposing back into the Queen's Gambit. (1.... e5 in response to 1. g3 can be answered with 2. c4 and White has a nice enough reversed Sicilian.) That pressure on the Pawn d5 tends to rein in Black's Queen Bishop which White naturally finds desirable (whereas after, say. 1. g3 d5 2. d4 Nf6 3.Nf3 Black can play 3.... Bf5).
After 1. g3 d5 I usually reply 2. Nf3 and can hope to play a dynamic Gruenfeld reversed.
The hypermodern treatment someone mentioned would be something like 1. g3 d5 2. Bg2 e5 3. c4.

My chess knowledge is no where near chess masters, but here's my 0.02$:
Yep, taking space is an important issue in chess. But then there are some trade-offs even for excellent/'perfect' moves:
- g3 can later increase control of the center via bg2
- it can also solidify defenses near the king of the king castles king side
- yet it commits a minor piece in the battle for the center (i.e. what about if the opponent commits pawns for center control, or one less minor piece for center-control and use it to attempt to make weaknesses elsewhere?)
also as someone who loves to have 'corner pawn attacks' against fianchettoed bishops I like it when my opponent fianchettos their king's bishop
On a somewhat related note I prefer to fianchetto the Queen bishop as to the best of my limited knowledge and my play style it suits best (at this stage, at least). But this is just a conjecture without well-established proof to back it up
I'm glad that players at higher levels are reflecting about it too

1 g3 or 1 g6 seems to be putting the cart before the horse. If you play 1 g3 and Black plays ...e5 and then ...d6, or if you then play d4, the Bishop you fianchetto on g2 will be very restricted in controlling or threatening squares.
A IM or GM may see deeply enough to recognize good things about the position but I, an 1800 player who relies slightly on position and mostly on tactics, would find my game limited and weakened by such a move!

I don't understand how Bg2 is restricted with e5-d6...
If u want this, then d5/c6/e6 is the idea but white can fight with c4/e4 then.

its benko's opening. Much like 1.nc3. it can be used as transpositional weapon but they are also interesting independent lines to play as well.

1 g3 or 1 g6 seems to be putting the cart before the horse. If you play 1 g3 and Black plays ...e5 and then ...d6, or if you then play d4, the Bishop you fianchetto on g2 will be very restricted in controlling or threatening squares.
A IM or GM may see deeply enough to recognize good things about the position but I, an 1800 player who relies slightly on position and mostly on tactics, would find my game limited and weakened by such a move!
In structures with white pawn on e4 and black pawn on e5, sure, the g2 bishop can look a little silly, but even then usually it's never worse than playing the black side of e.g. some pirc variation.
So other than white playing e4, I don't see how ...e5 and ...d6 hurts the g2 bishop.
And d4 mixes just fine with Bg2... the Catalan is a very popular opening at all levels.

1 g3 or 1 g6 seems to be putting the cart before the horse. If you play 1 g3 and Black plays ...e5 and then ...d6, or if you then play d4, the Bishop you fianchetto on g2 will be very restricted in controlling or threatening squares.
A IM or GM may see deeply enough to recognize good things about the position but I, an 1800 player who relies slightly on position and mostly on tactics, would find my game limited and weakened by such a move!
In structures with white pawn on e4 and black pawn on e5, sure, the g2 bishop can look a little silly, but even then usually it's never worse than playing the black side of e.g. some pirc variation.
So other than white playing e4, I don't see how ...e5 and ...d6 hurts the g2 bishop.
And d4 mixes just fine with Bg2... the Catalan is a very popular opening at all levels.
Yep plus with g2 and e4 e5 being played things can transposition into the King Indian Attack

1 g3 or 1 g6 seems to be putting the cart before the horse. If you play 1 g3 and Black plays ...e5 and then ...d6, or if you then play d4, the Bishop you fianchetto on g2 will be very restricted in controlling or threatening squares.
A IM or GM may see deeply enough to recognize good things about the position but I, an 1800 player who relies slightly on position and mostly on tactics, would find my game limited and weakened by such a move!
In structures with white pawn on e4 and black pawn on e5, sure, the g2 bishop can look a little silly, but even then usually it's never worse than playing the black side of e.g. some pirc variation.
So other than white playing e4, I don't see how ...e5 and ...d6 hurts the g2 bishop.
And d4 mixes just fine with Bg2... the Catalan is a very popular opening at all levels.
Yep plus with g2 and e4 e5 being played things can transposition into the King Indian Attack
well Benko beat Fischer by using the 1.g3 move order to confuse Fischer into thinking White has nothing better to do then to return to KIA territory which is not true.

g3 obviously a good first move, but depends on your style of play, As white you get the first move, which gives you the ability to dictate the game to a greater degree. Of the good first moves e4, d5, c4, Nf3, and g3 it may be the most flexible yet least forcing opening move. In effect giving away some of that early initiative.
For example, d4 prevents e5, and many black defenses to d4 center around idea of trying to force e5 at some point. g3 doesnt seem to really prevent anything.
I think of it as 'Fine, you want equality? Here it is 1 g3! now lets play!'.

Consequently, that's a nice way to play against the KIA if your move order doesn't require an early Nf6

White_Knight: I agree but after 1...e5 2.c4 the game is nothing more than a classical English Opening, and I don't think that latter ls a very surprising opening.

Interesting that e pawn and d pawn openings realy define the whole of chess in that you are playing a closed game, an open game or a semi-closed game. We define other openings in oposition to central square ocupation. Asymetrical systems are dynamic rather than symetrical and head on. But hypermodern systems can be symetrical and lack dynamic play on ocasion.
All we know that - Chess is mostly about taking space, preferably center. So; this first move 1.g3?! foreign for basic chess rules.
1- What do you think with this first move?
-2 What is the idea behind this move?
-3 Do you like to play 1.g3 1.g6 '' Modern opening '' structure? If yes, why? and why not?!
I'm curious with your opinion.
Bahadir