(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 | |
|---|---|---|---|
 | Hide and Xeek by HalfBakedLunatic (on 24. December 2023, 03:32) | 46 |  93 % |
| Six Loop by oskode (on 25. August 2025, 06:06) | 42 | 92 % |
| Broken Fence by Myxo (on 2. December 2022, 01:16) | 94 | 98 % |
| The Engine (Killer sudoku) by sujoyku (on 19. July 2025, 16:54) | 134 | 97 % |
| U-Bahn mit gemischten Hinweisen (Teil 2) by Zzzyxas (on 28. December 2019, 13:32) | 48 | 99 % |
| Anti-Springer Killer, "Turfan Fragment" by glum_hippo (on 23. March 2021, 20:14) | 32 | 91 % |
| Battle With The Archers 4: Dual Crossbows by Playmaker6174 (on 23. June 2021, 07:57) | 55 | 95 % |
| The 3-Colour Theorem by starwarigami (on 10. February 2023, 19:54) | 103 | 96 % |
| U-Bahn by Piatato (on 14. August 2023, 10:54) | 48 | 98 % |
| Cascade by zetamath (on 20. August 2023, 15:43) | 86 | 93 % |
| The Electrified Trio by Playmaker6174 (on 26. August 2023, 09:15) | 28 | 94 % |
| Slingshot Full Rank Fillomino by Piatato (on 27. December 2024, 18:38) | 26 | 100 % |
| Decompression by ThePedallingPianist (on 25. January 2025, 15:40) | 27 | 96 % |
| Mut zur Lücke! by Wuschel (on 28. October 2023, 16:14) | 69 | 98 % |
| Mineswee-Pea-Er (Split Peas/Yin Yang) by damo_89 (on 11. August 2025, 19:52) | 66 | 95 % |
| 5-Stern-Star-Battle by CJK (on 2. July 2021, 10:17) | 42 | 94 % |
| Middle Ground by Qodec (on 10. August 2021, 15:53) | 41 | 90 % |
| Paradox by Xenonetix (on 5. June 2022, 01:11) | 32 | 96 % |
| Doom Loop (Filloku #6) by mormagli (on 12. November 2023, 17:30) | 39 | 98 % |
| Orla The Octopus by ThePedallingPianist (on 9. February 2024, 19:41) | 38 | 98 % |
