(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 | |
|---|---|---|---|
 | Build Your Own Killer: Criminal Mind by Playmaker6174 (on 3. March 2022, 18:07) | 41 |  100 % |
| MIA by zetamath (on 24. May 2022, 16:03) | 96 | 98 % |
| Suguru Chaos Deconstruction: Sectioned Thermos by crispy16 (on 23. April 2022, 16:44) | 74 | 98 % |
| Wichtelkalender 2013 - Oktober by pin7guin (on 1. October 2013, 00:00) | 27 | 91 % |
| LM 2016 - Spätfolgen: Sternenhimmel-Japanische Summen by ibag (on 15. August 2016, 20:13) | 42 | 99 % |
| Unbekannte Bahnhöfe by Dandelo (on 13. August 2021, 18:23) | 15 | 100 % |
| Wichtel 2020 (13 und Schluss): Bescherung in Überlappenhausen by wichtel (on 27. October 2021, 20:20) | 14 | 100 % |
| Chaos Construction: Arachne by tesseralis (on 24. September 2022, 08:20) | 31 | 97 % |
| Maelstrom by MavericksJD (on 2. June 2023, 02:07) | 32 | 92 % |
| Boxed Rooms (Chaos Construction) by thoughtbyte (on 26. August 2023, 13:01) | 62 | 96 % |
| The Deck of Many Things by ViKingPrime (on 7. September 2023, 20:30) | 14 | 98 % |
| No Mountains Allowed by Laake (on 19. November 2023, 23:52) | 17 | 94 % |
| Arrows to the gates of hell by damasosos92 (on 6. February 2024, 23:17) | 13 | 96 % |
| Regionometers by ThePedallingPianist (on 20. February 2024, 13:20) | 30 | 96 % |
| Thirteen Ghosts by mathpesto (on 19. September 2024, 22:37) | 64 | 100 % |
| [TSL][S1T6] Across the Stars by The Book Wyrm (on 30. July 2025, 17:07) | 16 | 98 % |
| Entropy Antimatter by Mad-Tyas (on 5. March 2024, 16:24) | 38 | 93 % |
| The Moving Finger (Numbered Regions Chaos Construction) by tallcat (on 27. February 2025, 03:00) | 148 | 98 % |
| Century (Counting Circles + Numbered Rooms) by tallcat (on 29. May 2024, 08:00) | 57 | 98 % |
| Indexed Chaos by Jay Dyer (on 3. September 2022, 23:42) | 79 | 100 % |
