Cliff Pickover on Twitter: "A "mate-in-546" position, which with perfect play is a forced checkmate in 546 moves. https://t.co/XNjNTbhnuk https://t.co/syvblVv12w" / Twitter
File:US Navy 070505-N-4163T-055 Boatswain's Mate 3rd Class Jason Beres, a reservist assigned
Who wins from this (Puzzle)? - Chess Forums - Chess.com
The choice works of Thomas Hood, in prose and verse. he Virgin vowd,As save-alls gainst his ending.Down fell the mate, he thought his fate,Check-male, vas close impenduig ! Down fell the
White to mate in 549 (Prompt: there is a knight underpromotion on the 6th move). This is the longest possible forced mate in 7 or less pieces endgames. It was calculated by a supercomputer. Visualized solution and PGN are in the comments. : r/chess