- AoCG2021 Day 1: Automated delivery frenzy
- AoCG2021 Day 2: Naughty or nice?
- AoCG2021 Day 3: Say-Look-Say (Posted thanks to @lyxal)
- AoCG2021 Day 4: Infinite Elves and infinite houses 2 (Posted thanks to @lyxal)
- AoCG2021 Day 5: Balancing sleigh with lots of trunks (Posted thanks to @alephalpha)
- AoCG2021 Day 6: Taxicab in a triangular city
- AoCG2021 Day 7: Bathroom security goes wild
- AoCG2021 Day 8: Delivery Corrections (Challenge contributed by @Wheat Wizard (Grain Ghost))
- AoCG2021 Day 9: Spiral memory stress test
- AoCG2021 Day 10: Memory reallocation routine
- AoCG2021 Day 11: Garbageful streams (posted by @lyxal)
- AoCG2021 Day 12: Oct's Fool (also posted by @lyxal)
- AoCG2021 Day 13: Defrag in action!
- AoCG2021 Day 14: Adjusting dancing program's period
- AoCG2021 Day 15: Leapfrog Santa (Challenge contributed by @Wheat Wizard (Grain Ghost))
- AoCG2021 Day 16: Interpret Duet
- AoCG2021 Day 17: Langton's Hexa-Virus
- AoCG2021 Day 18: Stripping Strips (posted by @lyxal)
- AoCG2021 Day 19: To Hire or To Fire (posted by @pxeger)
- AoCG2021 Day 20: Wonky license check
- AoCG2021 Day 21: Blinking through the forest
- AoCG2021 Day 22: Hyperbolic rescue (Challenge contributed by @Wheat Wizard (Grain Ghost))
- AoCG2021 Day 23: Finding the best seat
- AoCG2021 Day 24: Is the bus company cheating? (posted by
@Riker@pxeger) - AoCG2021 Day 25: Stitching maps together (posted thanks to @lyxal)
