+Revise variants code by using more aggregate/disaggregate flags functions?
+
# New variants
8-pieces https://www.youtube.com/watch?v=XZ8K02Da7Ps&list=PLRyjH8DPuzTBiym6lA0r84P8N0HnTtZyN&index=6&t=0s
https://www.chessvariants.com/rules/8-piece-chess "Eightpieces"
Rugby http://www.echecspourtous.com/?page_id=7945
-"Capture" Chess (idea of opperwezen, maybe not new): captures are forced,
-but the goal is still to checkmate (not lose all material).
-
Cannibal Chess with forced captures.
Knightrelay: implement "official" version as Knightrelay v1