I’m fairly sure we’re limited to 16 chess pieces available to white, otherwise the problem can be trivially solved with 64 queens.
The puzzle is for those 16 initial pieces put anywhere on the chessboard. The color is not an issue.
Do the bishops have to be in legal positions? EDIT: already answered
They can be anywhere. The same color, too.
I’m fairly sure we’re limited to 16 chess pieces available to white, otherwise the problem can be trivially solved with 64 queens.
The puzzle is for those 16 initial pieces put anywhere on the chessboard. The color is not an issue.
Do the bishops have to be in legal positions? EDIT: already answered
They can be anywhere. The same color, too.