Multiverse: if one of your pieces are captured then Multiverse will bring you to a position where it's mate in 1 for you, but the mate will be extremely hard
create the most stupid chess pieces!

THE ATOMIC BOMB. the game ends as a draw because both the kings are gone, there are no pieces on the board,
Multiverse: if one of your pieces are captured then Multiverse will bring you to a position where it's mate in 1 for you, but the mate will be extremely hard
M1s aren't hard to spot

Can be moved by either player, moves like a king, and can’t be captured, but the move is a random dice roll, as you can’t choose the square it moves to

Someone probably already did this, but: THE WALL 1.Can be placed 2.Doesn't move 3.Stops checkmate 4.Knights can't jump over THE WALL

Here's another one: The Kamikaze (probably been done before, but if you think I'm going to look through 200+ examples to see, think again)
- The Kamikaze is a random piece on each person's side (can be anything except the king) which is set to blow itself up after a random number of moves. The explosion is like a capture in atomic chess, only it takes everything out — including pawns and even the Kamikaze's own pieces.
- The Kamikaze for each side (and the number of moves before they go off) is randomly decided by someone else. The number of moves before either explosion must be greater than ten, but it can otherwise be any number; and the numbers for both are not necessarily the same.
- Neither player knows which piece it is, or when it's going to happen. Not even for their own side.
- If the Kamikaze is captured before it explodes, it is "defused" and no explosion occurs. Players will not be made aware of this and will continue to be paranoid.
- If the Kamikaze makes a capture, nothing out of the ordinary happens (unless, of course, it's time for it to blow up).
- Obviously, a kamikaze that kills the king in its explosion wins the game by default, or loses if it kills its own king.
- If either king is checkmated, the kamikaze on the "losing" side automatically explodes. If it takes out the checkmating piece, the game continues; if it takes out the opposing king, the game is a draw. Otherwise, it's a normal loss.

The duck in duck chess needs to be a piece. It can be moved anywhere in a turn, blocking the other persons piece. 🦆
@Chessian-Ian : this piece makes 1 minor blunder for every 10 best moves (great= 2 best and brilliant=5 bests) (because in chess games that's what happen to me)
For the kamikaze, the number of moves until the explosions should be longer the more valuable the piece is. Like, for example, if a queen and knight are selected, the queen should explode 3 times more slowly than the knight or something like that so that you get more value out of it, it would otherwise be unfair for your queen to blow up on turn ten and on thirtiet move an opponent's pawn explodes


Duck: After a move, the player has to put the duck anywhere on the board and the opponent cannot move a piece to that particular square. You cannot leave the duck anywhere and have to move it after you make a move. Hope that makes sense.
ICBMG piece: when you play a gambit, an ICBM will come to the board and kill your opponent and set the board to the ICBM Gambit.