(Very) Hard AND nice puzzles
The following list contains portal puzzles that have been rated as nice or very nice and that are difficult. These puzzles are recommended for experts - and allow some time to solve.
| Description | solved | Rating | |
|---|---|---|---|
 | Clockwork Yajilin: Challenger by wisty (on 5. March 2024, 23:10) | 20 |  97 % |
| Antenna by Gene The Supreme (on 27. January 2025, 18:37) | 28 | 90 % |
| Chaotic Meidjuluk #3 by PrimeWeasel (on 12. January 2026, 15:29) | 23 | 100 % |
| Quantum Irregularities by gdc (on 29. June 2024, 19:13) | 53 | 96 % |
| Projectile Perturbation by DadJokes (on 24. August 2022, 19:34) | 90 | 96 % |
| Zodiac Project: Ponta Delgada by Florian Wortmann (on 9. July 2024, 19:49) | 122 | 97 % |
| X---Ternal by riffclown (on 13. January 2022, 00:48) | 26 | 95 % |
| Ironworks by Bremster (on 20. January 2022, 00:08) | 35 | 95 % |
| Glyphs #3 by damasosos92 (on 12. January 2023, 16:17) | 28 | 96 % |
| The Monarch's Math by AFrayedKnot (on 5. March 2026, 09:06) | 29 | 93 % |
| Give Me a 13! by Md88keys (on 25. April 2026, 02:30) | 62 | 93 % |
| ← Find-the-Whisper-Loop → by ElChiglia (on 23. March 2024, 07:15) | 37 | 92 % |
| Dragon Road by Black_Doom (on 14. July 2025, 17:25) | 70 | 97 % |
| Japanische Summen auf Antimagneten(2) by r45 (on 9. July 2013, 09:07) | 68 | 99 % |
| Dead Roman Miracle by Fool on Hill (on 30. July 2022, 11:26) | 85 | 95 % |
| Until Ten (10-lines, parity mirror) by the_cogito (on 20. February 2023, 15:28) | 41 | 97 % |
| Dutch Flat Mates (Product Ltd + Skyscrapers) by Crusader175 (on 19. March 2025, 11:30) | 44 | 96 % |
| U-Bahn 3 by wooferzfg (on 28. June 2025, 06:28) | 39 | 95 % |
| Die Traumaufzeichnung by berni (on 28. May 2009, 14:38) | 45 | 91 % |
| Tesla Coil (German Whispers + Odd/Even) by purpl (on 3. November 2021, 19:27) | 53 | 93 % |
