This can be combined with Chess960. Reasons:
- make the game less drawish
- allow new middlegame/endgame tactics/strategies
- None (default)
- King of the Hill (i.e. center squares: d4, e4, d5, e5)
- King of the Hill restricted (i.e. only d5 and e5 for white, d4 and e4 for black)
- Eighth rank (i.e. a8-h8 for white, a1-h1 for black)
- Opposite corners (i.e. a8 and h8 for white, a1 and h1 for black)
- Throne (i.e. d8 and e8 for white, d1 and e1 for black)
- Try rule (i.e. starting square of opponent's king)