I want to report the experiences I've made to this day with the Reti gambit:
My first game was against a player rated about 2430.
The opening went 1.e4 e6 2.b3 d5 3.Bb2 Nf6 4.e5 Ng8 I think the strongest move now is 5.d4 what I played. I don't really trust the other setups given in TJ's book. By the way, I think there is a slight mistake in the book: on page 157 TJ writes that the game could transpose back to an advance proper if white plays a3 and b4.
If you cont the moves, white got b3 and Bb2 for free, so a3 and b4 takes 2 moves.
But normally, a3. b4 and Bb2 takes 3 moves, so white is still a tempo up.
The game continued: 5. ... c5 6.c3 Nc6 7.Nf3 Nge7 8.Bd3 cd4: 9.cd4: Nf5 10.0-0 a5?! 11.Bf5:! ef5: 12.a4 when I was slightly better and managed to reach a won endgame with good knight against bad bishop, which I lost due to a blunder in time trouble.
The second game against a player with about 2070 went 1.e4 e6 2.b3 d5 3.Bb2 Nf6 4.e5 Nd7 5.Qg4 c5 6.f4 Nc6 7.Nf3 a6 8.Be2 Rb8! this move is a novelty and is not given in TJ's book.
In comparison to 8. ... b5 9.a4 in the game white can't block the black pawns on the queenside and so has less space for his pieces.
9.0-0 b5 10.Nc3 Nb6 11.Kh1 g6 12.Nd1 Ne7 13.Qh3 h5 14.d4 c4 15.Ba3 a5 16.Bd6 Rb7
although white has gotten his "bad" bishop outside the pawn chain, I don't think he has a real advantage.
White's pieces are really clumsy, he has the worse pawn structure on the queenside and it is nearly impossible to play the key move f4-f5!
So I don't see a way for white to play for the advantage in this system with 3. ... Nf6
I won the game later after my opponent got into serious time trouble because he took so much time on the first 20 moves.
The third game my opponent was about the same strength and the opening went:
1.e4 e6 2.b3 d5 3.Bb2 de4: (at last!) 4.Nc3 f5 5.d3 Nf6! 6.de4: Qd1:+ 7.Rd1: fe4: and now I played 8.Bc4?! instead of TJ's 8.a3! and soon got a slightly worse position.
So until now, I didn't have a really pleasant game typical of 2.b3, what I also think is that most stronger players tend to play the variation with 3. ... Nf6 because it promises a "french" position.
Any opinions?