(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 | |
|---|---|---|---|
 | Mount Elbrus (Killer sudoku with doublers) by Qodec (on 4. February 2024, 17:22) | 133 |  97 % |
| Wichtels Rätselsommer 2024 (3): Diebische Wichtel by wichtel (on 17. August 2024, 20:23) | 21 | 99 % |
| Mounting Pressure (Between Lines) by Blashyrkh (on 3. September 2024, 11:57) | 43 | 96 % |
| A Clockwork Orange by .proxz14 (on 29. March 2025, 11:11) | 18 | 93 % |
| The Ones Who Came Before by Manta-Ray (on 30. October 2025, 14:42) | 20 | 98 % |
| Zebediah Killgrave by starwarigami (on 24. November 2023, 10:01) | 78 | 95 % |
| Noodles by Paletron (on 10. May 2024, 22:08) | 59 | 97 % |
| Compass Fillomino #5: Large Ring by MagnusJosefsson (on 3. September 2021, 10:59) | 39 | 96 % |
| Ancient Tablet by Kafkapharnaum (on 25. July 2023, 15:51) | 39 | 100 % |
| Monster Math by ThePedallingPianist (on 26. October 2023, 02:40) | 36 | 100 % |
| Round Robin by IcyFruit (on 12. January 2024, 21:24) | 38 | 96 % |
| Dedicated to wisty by Myxo (on 21. January 2025, 14:25) | 35 | 94 % |
| Outside Killer U-Bahn by the_cogito (on 8. July 2025, 17:16) | 37 | 99 % |
| WPC Preparation 2019: Loopfinder by pwahs (on 3. January 2021, 16:23) | 17 | 93 % |
| Poison Arrow 2 by FryTheGuy (on 13. May 2021, 04:04) | 19 | 93 % |
| Wichtel 2020 (13 und Schluss): Bescherung in Überlappenhausen by wichtel (on 27. October 2021, 20:20) | 16 | 100 % |
| Regional Chess Sums: A Proper Introduction by Nordy (on 24. January 2022, 09:30) | 17 | 95 % |
| Die Kryptos - S05E04: Zelte und Bäume by tuace (on 1. September 2022, 20:22) | 15 | 98 % |
| Di-agony! by ThePedallingPianist (on 24. November 2022, 17:07) | 76 | 97 % |
| LM-Quali 2023 Leftover: Hashiwokakero by CJK (on 12. March 2023, 20:23) | 17 | 95 % |
