What strange chess rules can you think up?

Chess of Cards: If you try to capture, put the opponents king in check, or promote a pawn, you must play a random card game that decides if you are allowed to or not. This game can be War, Uno, BS, etc. If you win the game, you are allowed to play this move. If you lose, you must undo that move, and the piece you just moved is unable to move for 3 more turns. If you are trying to capture a piece and you lose this card game, your piece just disappears. The card game you play is determined by a wheel. Whatever game it lands on will be the game you play. The rules also apply for checkmates.

Monopoly DLC: You can buy squares and charge rent if your opponent lands on it.

Cost is calculated as follows:

Red = 100

Yellow = 200

Green = 300

No highlight = 500

Depending on the piece that lands on the square, a rent multiplier is added:

Pawn = 1x

Knight = 1.25x

Bishop = 1.4x

Rook = 1.5x

Queen = 2x

King = 2.5x

Opponent capturing a piece on a square you own = 2x

You can upgrade a square for 2x the rent to multiply rent by 1.5x permanently

Every player starts with 1000.

Shop:

Pawn - 500

Knight - 1500

Bishop - 1800

Rook - 2500

Queen - 5000

+1 min - 100

Instant Win - 999999

Pizza - 3000

Drink - 2000

Pizza + Drink - 4000

Extra Move - 1001

Seriously I had the idea of Monopoly Chess, but I didn't know how it would work.

oh ok

Every time you fork a queen and a bishop with a rook, you have to stick a skewer in your rook and successfully throw it in a glass cup with a square base, or else you lose.

Unless it's the third Tuesday of the month, in which case you have to use a metal cup.

Capture and sacrifice the Kinggggggggg!!!!!!!!!

High Voltage Chess: It is like normal chess, but for every move your opponent does, you get electrocuted more and more by 25 watts of electricity. If your opponent captures a piece, you get 30-70 watts of electricity for that turn, depending on what piece is captured. If your opponent puts you in check, it is 35-60 watts of electricity, depending on what piece puts you in check. If your opponent promotes, it is an extra 75 watts. And, if you are checkmated, it is an extra 100 watts! You can still resign, but that'll be 200 more watts before the game ends.

There are ways you can lower the amount of electricity, since it will be passing through your body the entire game. If you are the one who captures a piece, checks, or promotes, they will go down by how much it goes up to your opponent.

Every piece has different values.

Pawn = 30 watts

Knight = 35 watts

Bishop = 45 watts

Rook = 50 watts

Queen = 70 watts

The pieces you are checked with will increase the voltage, depending on the piece.

Queen = 35

Bishop = 40

Rook = 45 

Knight = 50

Pawn = 60

I hope you have fun!

Planes: If the rooks are doubled, you can say that you love God and a plane will eliminate both Rooks

This will also give you 2977 material points. You will permanently banned from playing in Saudi Arabia, though.

After losing the game, the loser must scream, "I am a loser!" and then Sh!t themselves

“Why must I lose to these idiots!” - Aron Nimzovich

”What a patzer I am!” - Miguel Nadjorf

Each lap the king does to each end of the board (first and eighth ranks) it can move one additional square in each direction, slowly turning into a queen. Maximum distance is seven squares plus on the eighth lap it also gets the knight's movements in addition to being able to move like a queen (board length minus the square the king is on plus one additional lap to gain knight movements, counting past that would be useless and annoying). Useful for endgames, also the king cannot pass through a threatened square unless the move captures the piece that is threatening the square.

TL;DR: Kings get more powerful each lap they do across the board's eight ranks.

I was about to say that this will also get you banned in North Korea, but I'm not even sure if they have chess in North Korea :/

Internet Crash: your opponent’s internet gives out for seven minutes if you take out your rooks and queen. 

If it is a player's birthday, that player gets 7 extra queens. No questions asked.

The pawns on the E and D files are replaced with checkers pieces. They work like normal checkers pieces, can promote into checkers kings (Do not have check/checkmate rules like the actual kings). Any pieces they jump over do get captured, except the king, which remains on the board but can still be jumped over.

Stalemate happens when both kings touch the corner

If you promote the E pawn, you automatically become the President of Malta.

if rook