The Powerup-Zone Tag
This is very much like promotion, but distinguished by giving only temporary additional powers.
- Bull's eye. Upgrading of the possibilities to move within the Bull's eye to make the game more dynamic. (8x8, Cells: 64)
- Palace. 7x7 board with a 3x3 Palace at the centre, where King promotes to Queen.
- Renezans Chess. 9x9 game with gnus and central powerup square.