Your queen is a Necromancer. Every piece you capture can rise again on your side.
How to play
Normal chess rules and check rules apply (no castling or en passant). Each queen is replaced by a Necromancer, who moves like a queen.
Pieces you capture go into your Graveyard. While your Necromancer is alive, you can spend your turn to raise one of them: pick it from the graveyard, then click an empty square next to your Necromancer. It returns as an undead piece on your side.
Limits: one raise every 3 turns. A raised piece may not give check the moment it appears. Undead pieces that are captured are destroyed for good. A captured Necromancer is gone forever, so take the enemy Necromancer to stop her army. Pawns promote to rooks.