2023-06-23 Thanks to 齋藤スバル (Subaru Saito) for checking the port and the puzzles on this page! 2023-06-29 Thanks to Lennard Sprong (X_Sheep) for suggesting the line counts ignore incomplete loops as well, now the current behaviour 2024-02-25 Thanks to Anurag Sahay for sharing a zero-one themed puzzle! 2024-02-26Anurag Sahaymodernised the rule panels for Zero One Lines! 2024-03-11puzzlettersPinkHoodie sent a 9x9 puzzle - thank you! 2024-05-24puzzlettersPinkHoodie included this genre in a puzzle series themed after the 26 letters of the alphabet! 2024-06-29puzzlettersPinkHoodie sent 1 classic plus 1 puzzle using variant arrow-yajilin-solve! 2025-01-03 Arrows in Zero One Lines became optional. If not given, all directions are considered.