put it in a database and see if any games have been played with it.
can someone tell me if this opening already exists?

put it in a database and see if any games have been played with it.
And not the one here. Use Megabase.
put it in a database and see if any games have been played with it.
And not the one here. Use Megabase.
can someone tell me if this opening as black already exists...
here i have it against the London system...