![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 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](https://preview.redd.it/qe6dsbg7z1q81.jpg?width=640&crop=smart&auto=webp&s=48834912f63f2cd7b2ac9411da15561188b3a731)
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
![Longest Chess Game In The World: 357 Moves In Leela vs Stockfish Superfinal TCEC S18 28 June 2020 - YouTube Longest Chess Game In The World: 357 Moves In Leela vs Stockfish Superfinal TCEC S18 28 June 2020 - YouTube](https://i.ytimg.com/vi/qRUpirohCqw/hqdefault.jpg)
Longest Chess Game In The World: 357 Moves In Leela vs Stockfish Superfinal TCEC S18 28 June 2020 - YouTube
![TIL that the longest chess game in history took place in 1989. The game had 269 moves that lasted 20 hours and 15 mins and ended on a draw : r/todayilearned TIL that the longest chess game in history took place in 1989. The game had 269 moves that lasted 20 hours and 15 mins and ended on a draw : r/todayilearned](https://external-preview.redd.it/KHyUiPqyIQlsrBXYQ-42Knmb3YP3puSEo-l40EjwMP4.jpg?auto=webp&s=7c4870052f5dd05a1105292dc82a7dcb4476e571)
TIL that the longest chess game in history took place in 1989. The game had 269 moves that lasted 20 hours and 15 mins and ended on a draw : r/todayilearned
![Holger on Twitter: "Longest (!?) chess game ever 239 moves #chess #record #schach #rekord #guinnessworldrecords https://t.co/qTQ3o7MSkh https://t.co/UG0KKDDF3W" / Twitter Holger on Twitter: "Longest (!?) chess game ever 239 moves #chess #record #schach #rekord #guinnessworldrecords https://t.co/qTQ3o7MSkh https://t.co/UG0KKDDF3W" / Twitter](https://pbs.twimg.com/media/CgKa-gjWIAA-plX.jpg:large)