Long ago (I think I then even mentioned this on CVP), the wiki on fairy chess pieces mentioned the Banshee (BNN) but apparently it has been largely edited out. The only mention of the Banshee currently (that I can see) is that it is sometimes given as another name for a Unicorn - this is said under the Unicorn entry (the one for (3D) Raumschach), which is a bit misleading since earlier elsewhere (before the edit I referred to) the Banshee had been explicitly given as BNN.
Wikipedia mentions a Banshee (BNN) piece type on more than one occasion. Here's one link:
https://en.wikipedia.org/wiki/Talk%3AFairy_chess_piece#Fairy_piece_values
Long ago (I think I then even mentioned this on CVP), the wiki on fairy chess pieces mentioned the Banshee (BNN) but apparently it has been largely edited out. The only mention of the Banshee currently (that I can see) is that it is sometimes given as another name for a Unicorn - this is said under the Unicorn entry (the one for (3D) Raumschach), which is a bit misleading since earlier elsewhere (before the edit I referred to) the Banshee had been explicitly given as BNN.
https://en.wikipedia.org/wiki/Fairy_chess_piece#List