(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 | |
|---|---|---|---|
 | Numbered Blocks by Chad (on 14. February 2024, 23:33) | 33 |  95 % |
| Seeing Around the Corner by Die Hard (on 8. July 2024, 00:07) | 33 | 98 % |
| Ninelives [X-Sums Chaos Construction] by Panthera (on 22. June 2021, 19:30) | 22 | 100 % |
| TE-N [Liar JSCC Ten Line] by Christounet (on 4. July 2024, 14:55) | 23 | 99 % |
| Wichtels Rätselsommer 2024 (6): Ein seltsamer Mischmasch by wichtel (on 9. September 2024, 20:23) | 22 | 100 % |
| Chaos is a Club Sandwich (9X9) by SenatorGronk (on 19. February 2022, 23:49) | 38 | 95 % |
| Fill Rank Fullomino by Myxo (on 31. May 2023, 13:26) | 54 | 98 % |
| Back to Entropia (Skyscraper, Entropy) by Mad-Tyas (on 20. November 2023, 10:46) | 65 | 97 % |
| -45 Killer by Mesmer (on 21. August 2020, 14:39) | 15 | 98 % |
| Wheel of Arrows (arrow + little killer sudoku) by Aspartagcus (on 6. April 2021, 12:20) | 48 | 96 % |
| Broken Mirrors (Anti-king, Little Killer) by emmettcito (on 13. April 2021, 20:56) | 15 | 94 % |
| Junction by grkles (on 22. May 2021, 03:53) | 27 | 99 % |
| 4D Arrow Sudoku by FryTheGuy (on 6. July 2021, 11:20) | 15 | 98 % |
| Pitchfork Emporium by FryTheGuy (on 21. December 2021, 04:10) | 30 | 95 % |
| 1347 by Sktx (on 1. February 2022, 23:43) | 18 | 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 % |
| The False Tautology (Zippular Lines #5) by heliopolix (on 12. February 2024, 21:16) | 14 | 96 % |
| Medusa's Lair by XeonRisq (on 5. April 2024, 20:00) | 17 | 100 % |
