(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 | |
|---|---|---|---|
 | Hyperloop (Double Trouble) by Mad-Tyas (on 10. November 2021, 13:53) | 25 |  98 % |
| High f**e! by filuta (on 30. March 2022, 15:29) | 48 | 96 % |
| X-Ray Vision (Yin Yang X-Sums Sudoku) by Agent (on 6. September 2022, 09:00) | 77 | 98 % |
| Sandwich Box by ademjaz (on 7. February 2023, 20:29) | 25 | 98 % |
| Glyphs #5 by damasosos92 (on 23. February 2023, 23:55) | 53 | 97 % |
| Double Time by shinggaming (on 7. March 2023, 20:16) | 15 | 93 % |
| Lighthouse Hashikabe by Nell Gwyn (on 24. April 2024, 20:42) | 15 | 98 % |
| Subway Roundabout by Niverio (on 21. August 2024, 22:25) | 41 | 98 % |
| Liar X-Sums Cipher (ft. rdrd) by Christounet (on 18. January 2026, 23:58) | 25 | 100 % |
| Crooked Sam by Jooshy (on 12. February 2026, 13:07) | 18 | 91 % |
| Killers and Palindromes by tenaliraman (on 3. January 2021, 06:45) | 41 | 98 % |
| #sudoku by matt383 (on 26. October 2021, 21:08) | 37 | 96 % |
| Third Order Logic by Die Hard (on 26. October 2025, 22:57) | 68 | 98 % |
| Krypto-Kakuro-Koralle für pin7guin by ibag (on 6. September 2013, 00:00) | 63 | 99 % |
| Recycler by Jay Dyer (on 24. March 2022, 19:39) | 25 | 99 % |
| Lookie Lookie (Doubler/Look-and-say/Renban) by dumediat (on 2. September 2022, 03:53) | 23 | 99 % |
| Siamese Coral (1) by KNT (on 6. March 2023, 02:36) | 51 | 100 % |
| Fillmat-doku by yttrio (on 12. January 2024, 21:48) | 43 | 98 % |
| It's a Wonderful Day For Pi! by SirWoezel (on 14. March 2025, 00:00) | 26 | 93 % |
| a brutal bliss beyond this empty defeat by aqjhs (on 14. August 2025, 21:36) | 24 | 99 % |
