I Want to Save Someone, but She Is Forgotten by the Whole World

This is supposed to be a god-making game, but when the rules are modified, the referee is killed, and the chessboard is corrupted, the whole world will become absurd and crazy! It's like a train going off the track, it deprives you of the most basic humanity, it's like raising worms and letting them fight, and in the end, when chess players become sacrifices, when human lives turn into maggots, even gods are powerless to save them! I watched her disappear in front of me, disappearing from the whole world. No one could remember her name, but she could leave her shadow in every game. Who are you and where are you? What exactly do you want me to do! Just when I was about to collapse, lose my humanity, and become a monster, I received a letter. This is a farewell letter: "When you read this letter, I will be gone." "I will exchange for your peace at the price of being forgotten by the world. This is the deal I made. I have no regrets." "I will stand in front of you, I will break your curse, I will answer your confusion, I will witness your growth, I will be your sword and shield, I will be the bond of your soul, and I will accompany you forever with my life." "Because I will always love you." The name at the end of the letter has long been blurred, but there is a rose blooming quietly on the paper.