Chess Piece or Abandoned Piece

The most painful thing in the world is being pushed into the abyss by the person you trust the most. He is a chess piece abandoned by the world, a lonely figure walking alone in the darkness. When the light ceases, it turns into night; When fate is unfair, break the rules. Abandoned children have no place to return, so they can only fight until dawn. I am me and not me; he is him or not him