(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 | |
|---|---|---|---|
 | Interlocked by Niverio (on 9. May 2022, 22:43) | 71 |  96 % |
| Ambiguous Identical Little Killers by Jeet Sampat (on 13. October 2022, 21:32) | 22 | 96 % |
| Psycho Dominoes by Allagem (on 9. January 2023, 00:53) | 21 | 94 % |
| The Magic Potion (Zippular Lines #2) by heliopolix (on 17. December 2023, 02:57) | 42 | 94 % |
| RV 315 by BaumJames (on 6. April 2024, 04:54) | 23 | 93 % |
| Octavia by steelwool (on 20. October 2024, 20:43) | 20 | 91 % |
| TTOL by ICHTUES (on 27. December 2024, 10:00) | 45 | 93 % |
| Mutagen by jsmirob (on 5. February 2025, 00:01) | 25 | 92 % |
| Minesweeper Chaos by Bert (on 22. March 2025, 15:31) | 20 | 93 % |
| 2D Printer (Pentomino + Loop) by sfushidahardy (on 17. September 2025, 18:29) | 20 | 99 % |
| Self-Contained by Ennead (on 30. September 2025, 21:27) | 20 | 91 % |
| Schrödinger's Flat by gdc (on 15. January 2026, 15:26) | 24 | 94 % |
| Same Difference by marty_sears (on 9. October 2023, 13:18) | 119 | 97 % |
| Sum Sets by Scruffamudda (on 28. April 2023, 11:09) | 64 | 97 % |
| Kropki Pairs Fillomino by Mark Sweep (on 23. November 2022, 10:00) | 41 | 93 % |
| In the Proximity by Lizzy01 (on 12. May 2023, 21:35) | 43 | 95 % |
| TDF Stage 1 by palpot (on 29. June 2024, 09:00) | 43 | 91 % |
| all the seats were occupied by aqjhs (on 15. December 2025, 17:17) | 40 | 93 % |
| Left Out by fritzdis (on 26. February 2021, 04:57) | 54 | 97 % |
| Dimensional Analysis by Fenners (on 2. May 2025, 19:16) | 94 | 97 % |
