(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 | |
|---|---|---|---|
 | Lonely Killers by Yawnus (on 11. March 2024, 12:14) | 110 |  97 % |
| Hot Spot by juggler (on 21. August 2024, 09:35) | 69 | 97 % |
| Airlocks (Pentominous) by Gliperal (on 17. May 2021, 01:04) | 31 | 92 % |
| The Graveyard Of Schrödinger by fjam (on 25. September 2023, 18:11) | 90 | 97 % |
| Slow Snake Somedoku by blackjackfitz (on 11. July 2024, 05:25) | 35 | 96 % |
| Mystery Room Somedoku by blackjackfitz (on 18. August 2024, 15:01) | 34 | 92 % |
| Miami by zetamath (on 28. May 2023, 20:49) | 56 | 100 % |
| Lazy River (w/ Nordy) by mathpesto (on 8. February 2024, 18:27) | 76 | 96 % |
| Toroidaler Kosmos by usp (on 27. February 2015, 00:00) | 23 | 92 % |
| Morgen ist Ostern by ibag (on 26. March 2016, 05:00) | 26 | 97 % |
| Thermo's Adea by PotatoHead21 (on 30. April 2022, 23:07) | 24 | 92 % |
| Icing disaster (Region sum lines/X-sums) by dumediat (on 30. June 2023, 22:38) | 70 | 93 % |
| Night on the Galactic Railroad by sfushidahardy (on 19. August 2024, 00:04) | 27 | 96 % |
| [TSL][S1T2] Chaotic Journey: Is this .... ? by yttrio (on 28. December 2024, 02:00) | 25 | 96 % |
| Spooky Action at a Distance by cygne (on 4. January 2026, 08:04) | 25 | 96 % |
| Little Nuts by Qodec (on 12. May 2021, 12:55) | 41 | 96 % |
| Limitless Potential #1: Zero to Infinity by Playmaker6174 (on 23. April 2023, 09:53) | 39 | 98 % |
| Apsidal Precession (Black Hole) by gdc (on 14. October 2025, 04:11) | 42 | 92 % |
| Thou Shalt Pass by Wuschel (on 3. February 2025, 09:39) | 55 | 98 % |
| XV*Magic 7 by NurglesGift (on 10. January 2025, 23:18) | 86 | 96 % |
