---
title: Red & Black Knights (extraordinary result) - Numberphile
link: https://www.youtube.com/watch?v=UiX4CFIiegM
source: youtube-com-numberphile
published: 2026-05-12T13:05:01Z
updated: 2026-05-19T17:38:25Z
first_seen: 2026-09-08T10:17:10.166315Z
authors:
- Numberphile
summary: |-
  Featuring Neil Sloane, founder of the OEIS... See the extra patterns and variations (including three knights) at https://youtu.be/VgmDuBCayPw
  More links & stuff in full description below ↓↓↓

  With thanks also to Jonas Karlsson - https://jonka364.github.io/

  Neil Sloane is the founder of the On-Line Encyclopedia of Integer Sequences - https://oeis.org/

  More videos with Neil Sloane: https://www.youtube.com/playlist?list=PLt5AfwLFPxWJXQqPe_llzWmTHMPb9QvV2

  See our Trapped Knight video - https://youtu.be/RGQe8waGJ4w

  More chess-related videos - https://www.youtube.com/playlist?list=PLt5AfwLFPxWKX9OPJqBQTdIOAKthKzQ9m

  OEIS sequences related to this video:
  https://oeis.org/A308885 (only black knights)
  https://oeis.org/A392177 & https://oeis.org/A392178 (red & black knights)
  https://oeis.org/A395357 (the final spiral)

  Patreon: http://www.patreon.com/numberphile

  Numberphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: https://bit.ly/numberphile-janestreet

  We are also grateful for support from the Ben Delo Foundation - https://delo.org/

  NUMBERPHILE
  Website: http://www.numberphile.com/

  Videos by Brady Haran

  Numberphile T-Shirts and Merch: https://teespring.com/stores/numberphile

  Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/

  Brady's latest videos across all channels: http://www.bradyharanblog.com/

  Sign up for (occasional) emails: http://eepurl.com/YdjL9
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---

Featuring Neil Sloane, founder of the OEIS... See the extra patterns and variations (including three knights) at https://youtu.be/VgmDuBCayPw\
More links & stuff in full description below ↓↓↓

With thanks also to Jonas Karlsson - https://jonka364.github.io/

Neil Sloane is the founder of the On-Line Encyclopedia of Integer Sequences - https://oeis.org/

More videos with Neil Sloane: https://www.youtube.com/playlist?list=PLt5AfwLFPxWJXQqPe\_llzWmTHMPb9QvV2

See our Trapped Knight video - https://youtu.be/RGQe8waGJ4w

More chess-related videos - https://www.youtube.com/playlist?list=PLt5AfwLFPxWKX9OPJqBQTdIOAKthKzQ9m

OEIS sequences related to this video:\
https://oeis.org/A308885 (only black knights)\
https://oeis.org/A392177 & https://oeis.org/A392178 (red & black knights)\
https://oeis.org/A395357 (the final spiral)

Patreon: http://www.patreon.com/numberphile

Numberphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: https://bit.ly/numberphile-janestreet

We are also grateful for support from the Ben Delo Foundation - https://delo.org/

NUMBERPHILE\
Website: http://www.numberphile.com/

Videos by Brady Haran

Numberphile T-Shirts and Merch: https://teespring.com/stores/numberphile

Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/

Brady's latest videos across all channels: http://www.bradyharanblog.com/

Sign up for (occasional) emails: http://eepurl.com/YdjL9