Freeze Ball: A simple circle that moves around the board like a knight.
1. Any enemy piece that is directly adjacent to the freeze ball becomes "frozen" and is not allowed to move under any circumstances, unless the freeze ball itself moves away or is captured. Friendly pieces are unaffected (with one exception; see below).
2. If the freeze ball is placed next to the opponent's freeze ball, both of them are frozen, and all pieces adjacent to either one become frozen as well. This lasts until either one is captured.
3. The freeze ball cannot make captures, but (as mentioned above) it can be captured. However...
4. ...If the freeze ball is captured, the capturing piece freezes to death and is also removed from the board. Keep in mind that it may NOT be captured with a pawn (or king, for that matter) due to the way it works, so be careful with who you pick to do the job!
5. If a frozen king is put in check, it still may not move. Therefore, a double check on a frozen king is always checkmate.
6. Freezing all of the opponent's remaining pieces is a stalemate unless the freeze ball moves or if the king is attacked (which is mate...because nothing can move).
Pawns that move backwards