Yeah around 70-75%! I did some Balanced games and haven't lost, so I'm guessing more than 90% Balanced games are clearable with the right sequence.
It's probably possible to go higher on Brutal but sometimes I am really stumped on what move sequence I should go for haha
I agree with your other comment, it would be really nice to be able to replay a seed! I've had so many brutal games where I almost found a winning sequence but made a calculation mistake along the way and wanted to see where it was!