- Anti-King Chess. Each player has both a King and an Anti-King to protect; Anti-Kings are in check when not attacked. (8x8, Cells: 64) (Recognized!)
- Extinction chess. Win by making your opponents pieces of one type extinct. (8x8, Cells: 64) (Recognized!)
- Giveaway Chess. Taking is obligatory; the first player that loses all his pieces wins. (8x8, Cells: 64) (Recognized!)
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