can see that uh this spike right here are all the these berlin defense variants and castling this 0 right here is a big part of that line if you do this in no castling chest you can see that these two moves now the histograms overlap much more which means that and in fact you can see in the in this number of possible moves right here that they come closer together so not only does the blue shift to the right the orange actually shifts to the left and it basically means that whether you open with e4 or knight