(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 | |
|---|---|---|---|
 | Wichtel 2021 (6): Flucht durch die Unterwelt by wichtel (on 24. September 2022, 02:21) | 18 |  99 % |
| Does Phistomefel's Ring Still Apply? by bodemeister (on 23. February 2024, 08:43) | 23 | 99 % |
| Irma Vep by mathpesto (on 16. April 2025, 17:22) | 40 | 97 % |
| Erratic U-Bahn by Agent (on 13. June 2025, 09:00) | 21 | 100 % |
| Nabner Doubledeal by Jay Dyer (on 20. September 2023, 13:35) | 53 | 97 % |
| Space Mountain by IcyFruit (on 1. December 2023, 22:12) | 32 | 97 % |
| Deconstructing Mysterious Little Killers by Jeet Sampat (on 26. February 2024, 16:07) | 33 | 96 % |
| Chaos Construction: Border Sums by kolot (on 1. February 2022, 17:06) | 76 | 99 % |
| Zum Geburtstag by Uhu (on 5. March 2017, 10:24) | 41 | 99 % |
| Roller Coaster Nurikabe by the_cogito (on 24. February 2023, 19:32) | 93 | 98 % |
| Crypto Japanese Cave with Indexers by KNT (on 20. October 2022, 06:39) | 57 | 100 % |
| Couples by kolot (on 28. July 2021, 14:07) | 31 | 94 % |
| Spaceships by antiknight (on 20. June 2022, 16:39) | 16 | 95 % |
| Chaotic Serpents by jsmirob (on 20. June 2022, 19:26) | 15 | 95 % |
| Fahrenheit's Vision by Xenonetix (on 11. July 2022, 22:22) | 52 | 99 % |
| Arrow Battle by 10feet (on 25. November 2022, 06:42) | 15 | 95 % |
| SET PIECE [Multiset Sudoku] by wisty (on 21. November 2023, 17:55) | 40 | 96 % |
| The Method of Differences by DarthParadox (on 16. December 2023, 21:06) | 28 | 95 % |
| Liar Japanese Sums #8 - Ciphered Deconstruction by Niverio (on 4. June 2024, 08:48) | 44 | 100 % |
| A Map to Distant Lands by The Book Wyrm (on 23. August 2024, 18:11) | 27 | 95 % |
