knightmate King moves as Knight, and vice versa
super Superchess (shuffle variant with 4 exo-pieces)
makruk Thai Chess (shatranj-like, P promotes on 6th rank)
+asean ASEAN Chess (a modernized version of Makruk)
spartan Spartan Chess (black has unorthodox pieces)
fairy A catchall variant in which all piece types
known to XBoard can participate (8x8)