How Did Anyone Crack This Puzzle In 6 Minutes?!

You can try the two Castle Wall puzzles featured in the video at the links below:
Ken Endo: https://tinyurl.com/uayep59
VanillaIce: https://tinyurl.com/y9fvq4eq

Thanks to Takuma Kitamura for his commentary on his solve of Ken's puzzle and to Ryotaro Chiba for the translation.

Castle Wall Rules: Draw a single closed loop (without intersections or crossings) passing through some empty cells in the grid. Black cells must be outside the loop; white cells (with heavy borders) must be inside the loop. Grey cells can be either inside or outside and you must work out which! Numbers and arrows refer to the total count of the number of cell borders crossed by the loop in that direction.

Nicolas Rasmussen's puzzle hunt can be played for free here:
https://www.patreon.com/posts/35846524

▶ Our New Puzzle Hunts are OUT ◀
Junior Puzzle Hunt: https://www.patreon.com/posts/junior-puzzle-35361588
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▶ OUR CHESS SUDOKU APP IS NOW OUT!◀
AppStore: https://apps.apple.com/us/app/chess-sudoku/id1500654482?ls=1
Steam: https://store.steampowered.com/app/1250560/Chess_Sudoku/
Android: https://play.google.com/store/apps/details?id=com.StudioGoya.ChessSudoku&hl=en_US

▶TRY OUR CLASSIC SUDOKU APP◀
AppStore: https://apps.apple.com/us/app/classic-sudoku/id1488838275?ls=1
Steam: https://store.steampowered.com/app/1188330/Classic_Sudoku/
Android: https://play.google.com/store/apps/details?id=com.StudioGoya.ClassicSudoku&hl=en_US

▶TRY OUR SANDWICH SUDOKU APP◀
AppStore: https://apps.apple.com/us/app/sandwich-sudoku/id1476116705?ls=1
Steam: https://store.steampowered.com/app/1117310/Sandwich_Sudoku/
Android: https://play.google.com/store/apps/details?id=com.StudioGoya.SandwichSudoku
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▶SOFTWARE◀
Play the puzzle in the video by clicking the link under the video (above). We are building a website which will allow you to enter your own sudoku puzzles into the software and this is coming soon!

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Melvyn Mainini

▶ABOUT US◀
Hi! We're Simon Anthony and Mark Goodliffe, two of the UK's most enthusiastic puzzle solvers. We have both represented the UK at the World Sudoku Championships and the World Puzzle Championships. We're also "cryptic crossword" aficionados. Mark is the twelve-time winner of The Times championship and Simon is the former record holder for most consecutive correct solutions to The Listener crossword. We hope we can help your puzzle solving while also introducing you to some of the world's best puzzles.

Thank you for watching!
Simon and Mark

Видео How Did Anyone Crack This Puzzle In 6 Minutes?! канала Cracking The Cryptic