Viktor never returned to competitive chess. Instead, he wrote a single line of code: a filter that flagged ghost games by statistical entropy. He donated it to ChessBase for free. In the acknowledgments of the 2025 edition, under “Special Thanks,” a single line appeared:

Searching... 14,832 games found.

He searched for all games by "Ivanov, A." from 2018 to 2020. Thirty-seven games appeared. He knew he’d played only twenty-two rated games in those years. Fifteen were ghosts. And every single ghost game featured a catastrophic blunder or a suspiciously timed loss. The same sacrificial motif. The same ratings band.