(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 Construction: 2nd Region X-Sums #1 (8x8) by Jesper (on 3. April 2022, 16:03) | 78 |  100 % |
| Hungry Hungry Renbans by sunnyjum (on 30. October 2022, 15:31) | 25 | 97 % |
| Knight's XV by Scruffamudda (on 25. April 2023, 22:38) | 28 | 94 % |
| Chaconopia Whirlwind by Mad-Tyas (on 8. September 2025, 12:55) | 25 | 99 % |
| Suspicious Dwarf by Myxo (on 22. March 2023, 13:34) | 84 | 94 % |
| Violet Owl by Tyrgannus (on 18. January 2022, 17:06) | 50 | 95 % |
| Boulder (Fillomino/Heyawake) by mathpesto (on 29. April 2023, 16:15) | 58 | 94 % |
| Monsoon by heliopolix (on 9. November 2023, 00:08) | 55 | 96 % |
| Auteur by SamuPiano (on 14. August 2024, 15:44) | 53 | 98 % |
| Ambiguity by zetamath (on 8. April 2021, 01:48) | 81 | 96 % |
| UFO (RSL, Entropy) by Mad-Tyas (on 4. November 2024, 00:09) | 85 | 93 % |
| Cithara by BIGfoot (on 2. November 2021, 15:38) | 29 | 92 % |
| Very Friendly by PrimeWeasel (on 22. December 2022, 10:57) | 23 | 99 % |
| Mauskurven by Myxo (on 21. July 2023, 15:46) | 53 | 100 % |
| Search Nine Sandwiches by RockyRoer (on 10. August 2023, 05:22) | 24 | 95 % |
| Corners and Sum Lines by Jolly Rogers (on 7. March 2024, 22:17) | 54 | 95 % |
| Say, What Do Little Killers Eat? by RockyRoer (on 25. July 2024, 20:18) | 23 | 93 % |
| The Nine Hells by 10feet (on 5. September 2025, 22:26) | 25 | 90 % |
| Foggy Expeadition by SamuPiano (on 14. June 2025, 15:44) | 110 | 96 % |
| Entropy Minimalism by Mad-Tyas (on 10. January 2022, 13:01) | 80 | 96 % |
