In 2024, this genre was featured at Grandmaster Puzzles, both as an Instructionless Sunday Special, and as Araf Loop, by Takeya Saikachi.
The first ever standard-sized loop and bounds puzzle from 2019 that remained unpublished until now (2025).
loading... puzzle1
New puzzles:
loading... puzzle2
loading... puzzle3
loading... puzzle4
loading... puzzle5
loading... puzzle6
Acknowledgements and Changes
2025-01-15 Thanks to Anurag Sahay for clarifying history of this ruleset.
2025-03-18 Thanks to Anurag Sahay for making the rule panels for Loop and Bounds and for noticing a bug in the main constraint, ironed out before the release.
2025-03-21 An edge case involving question marks was detected by PinkHoodie just in time for the release, who sent a good unit test. Thank you!
2025-03-21 puzzletters Thanks to Anurag Sahay and PinkHoodie for sending puzzles for the rollout of Loop and Bounds!
2025-03-22 puzzletters PinkHoodie sent a second loop and bounds puzzle for rollout - thank you.
2025-03-23 puzzletters Anurag Sahay sent a full-optional variant Loop and Bounds panel for the corresponding puzzle. Thank you!