this oppening is good or bad ( why)

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gass-SS
what is bad in this oppening ? What is the name of the oppening?

gass-SS

this is an exemple of the devellopement for this position

gass-SS

https://www.chess.com/game/live/123428166962?move=0 here is a game where I used the opening

SacrifycedStoat
Colle system is what chess.com calls it
gass-SS
SacrifycedStoat a écrit :
Colle system is what chess.com calls it

yes but colle systeme is just this

magipi

It started as a Colle, then white started playing very poorly. There are a lot of weaknesses on the queenside, the a3 bishop is extremely bad, the b1 knight and a1 rook are still undeveloped. Black already has a big advantage, close to winning.

pcalugaru

As a person who plays the Colle Koltanowski. Some pointers are in order...

First, take advantage that in essence you are playing a QG in reverse against 1..d5. I'm not sure the average Colle player looks at the opening moves that way. You are playing a Semi Slav as White with a bonus move. This means that after 1.d4 2. Nf3 and 3.e3.. you can also transpose into a QG either with and early c4 or... or look to play either a reverse QGA (with a move) or a reversed Cambridge Springs (with a move.) of course these lines are dependent on what black essays.

In reference to what the OP posted.. Black played a well known line in the Anti-Colle. Here are some improvements off the cuff.

 
This is just a taste of what White has to fight 3...Bg4 Once you get acquainted The Anti-Colle lines.. & learn when to transpose into a e3 Slav ....  they loose their bite.