If Pawn Demotion Was A Thing...

You All Know When A Pawn Reaches The 8th Rank (Or First For Black) They Promote Into A Queen, Knight, Bishop & Rook. But What If Pawn Demotion Was A Thing? Here's What Will Happen!

Example, If A Queen, Knight, Bishop & Rook Go To The 8th Rank (Or First For Black) They Demote Into A Pawn.

On The Flip Side, If The King Goes To The 8th Rank (Or First For Black) Then He Demotes Into A Pawn, Then You Will Lose The Game Instantly Since You Need A King To Win The Game.

On The Bright Side: This Makes Back Rank Checkmates Impossible! (Only If The King Stayed In His Castle Then The Pawn Promotes Into A Rook Or Queen.)

Interesting theory

Or a pawn could just demot into nothing and be removed from the board