(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 | |
|---|---|---|---|
 | Chaos is a Club Sandwich (9X9) by SenatorGronk (on 19. February 2022, 23:49) | 38 |  95 % |
| Liar U-Bahn by Myxo (on 8. June 2023, 12:47) | 38 | 99 % |
| Hallig-Rundreise by tuace (on 13. April 2015, 00:47) | 50 | 98 % |
| Back to Entropia (Skyscraper, Entropy) by Mad-Tyas (on 20. November 2023, 10:46) | 66 | 97 % |
| Nikolaus Challenge by Luigi (on 6. December 2009, 06:12) | 15 | 92 % |
| Broken Mirrors (Anti-king, Little Killer) by emmettcito (on 13. April 2021, 20:56) | 16 | 94 % |
| Odd one out by jenssteenmetz (on 26. June 2021, 23:06) | 16 | 100 % |
| 1347 by Sktx (on 1. February 2022, 23:43) | 20 | 98 % |
| 6 Puzzles, 6 Modifiers, 6 Digits by tesseralis (on 15. October 2022, 10:31) | 30 | 96 % |
| Nary A'Dot by mormagli (on 2. February 2023, 22:42) | 32 | 95 % |
| Sandwich gone BAD by PrimeWeasel (on 3. March 2023, 17:59) | 13 | 100 % |
| Dante's Chaotic Journey by SenatorGronk (on 7. July 2023, 04:16) | 31 | 100 % |
| The False Tautology (Zippular Lines #5) by heliopolix (on 12. February 2024, 21:16) | 15 | 96 % |
| Clockwork Yajilin: Blackout Cipher by wisty (on 19. March 2024, 22:26) | 15 | 96 % |
| Cityscape (Gravity/Counting Snakes) collab with Chad by dumediat (on 26. October 2024, 14:17) | 14 | 90 % |
| Say What You See by Manta-Ray (on 24. September 2025, 13:32) | 16 | 90 % |
| Pompeii by Kafkapharnaum (on 25. October 2025, 23:10) | 39 | 99 % |
| alte karte / ferneiland by aqjhs (on 14. November 2025, 02:34) | 20 | 98 % |
| Chaos Deconstruction: Double Snake by KNT (on 25. July 2022, 03:25) | 39 | 94 % |
| Wichtel 2021 (8): Ideenklau im Sparmodus by wichtel (on 17. October 2022, 12:02) | 33 | 100 % |
