The four kings badge can't be purchased unless you have 2 free squares on your setup board
The zombie rook badge no longer activates when you castle
locked badges can no longer be sold in a match
When poison is added to a square a piece is already occupying, they are now correctly poisoned
The "Shelf Life" challenge cannot remove a "No King" badge if there's no space for the king
The Archduke special ability being undone sometimes deleted the Archduke if the Archduke was taken in a square a pawn spawned on and slippy chess caused the attacking piece to slip (Sorry IWantCheckmate)
A "Clear all" button has been added for custom matches, for both your setup and your opponents
Timer badges now reset properly
Your pieces with modifiers keep their secondary color to hopefully make things clearer
You can now change the secondary color of your pieces in the settings. It's experimental for now and doesn't change the secondary color of pieces in all menus, but it's a start and gives people a chance to give feedback (please do!)