I once setup a 5-way attack....
Double Attack ?....that's NOTHING !

This is a 7-way attack, all topped off w/ whippy creme & a maraschino cherry, I'm calling a Double Discovered Checkmate....Nf6# !

IDK what's happening. I had that complaint a few dayz ago too where my board examples are not showing up.
IDK what to do !

I don't think I'm attacking all of the black pieces w/ the octopus arms of the horse. Like the black horse on e4. Is htat truly an "attack " ?....or the pawn at h7.
So. We need a accepted def for "attack". I can see an "attack" being given by a lesser piece tho' it's covered - like the castle at e8.
The object to the game is to setup up a multi-attack WITH CHECK....