I guess u mean line like this one which is a main line in Panov attack :
White is marginally better and most games at high level are draw but u know, at sub level...
Good news, we are not forced to transpose into Panov attack, so we can use this move order :
Where 7...Bg4 would be bad : 8.Qa4!
6...Bg4 would be too risky :
Thats why this move order (white didn't play d4 yet), avoids some options for black in Panov attack, but white also loses some...
A main line with this Bb5 idea could be :
White could think about replaying Bb5 on d3 to get a "normal" isolani position, but he/she could think about Bxc6.
Why do u want to develop your Ng1 on e2?
Almost always Nf3 to go for e5 with an isolated d4 pawn.
The Bf1 will go on c4 or d3, sometimes b5, according black's continuation.
ok, I thought Nf3 would allow pin and maybe even trades. What if the opponent starts trading, isn't that good for black in IQP?
Thanks. 😀