(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 | |
|---|---|---|---|
 | Magnetschlange 2 (Leftover der LM-Quali 2021) by ibag (on 1. March 2021, 22:22) | 36 |  98 % |
| Attention Deficit Disorder by HalfBakedLunatic (on 10. June 2023, 04:42) | 41 | 90 % |
| Differenz X Chaos Sudoku by tuace (on 17. December 2016, 11:03) | 43 | 96 % |
| Scrub Python (Palindrome Snake Sudoku) by peterchayward (on 18. July 2020, 11:25) | 47 | 95 % |
| the SAD Sudoku by bigger (on 4. December 2020, 09:57) | 21 | 90 % |
| Odd/Even Consecutive Killer 2 by Quarterthru (on 30. December 2020, 12:00) | 23 | 94 % |
| Quandary Lines by Tyrgannus (on 4. September 2021, 04:09) | 23 | 99 % |
| Balanced Cages by kolot (on 24. September 2021, 16:15) | 25 | 96 % |
| Combination Lock by Jay Dyer (on 9. December 2021, 00:22) | 19 | 96 % |
| More Drunken Knights by Blobz (on 9. September 2022, 16:00) | 93 | 96 % |
| Zahlen nach Malen / Numbers by paint by olima (on 10. June 2022, 16:16) | 21 | 97 % |
| Hybrid Star Battle Series (019) - Chiaroscuro by BenceJoful (on 17. May 2023, 03:02) | 22 | 96 % |
| Anti-Renban Killer by Phistomefel (on 10. March 2020, 13:05) | 86 | 97 % |
| Chromosome by ICHTUES (on 16. May 2021, 06:00) | 102 | 97 % |
| May XL-Month (5) - Blackout Domino by Richard (on 31. May 2013, 12:00) | 58 | 96 % |
| Bernis Geburtstags-Transporteur by uvo (on 13. June 2013, 21:15) | 26 | 99 % |
| Arrow Dynamics by SSG (on 23. June 2021, 07:58) | 32 | 97 % |
| X---Ternal by riffclown (on 13. January 2022, 00:48) | 26 | 95 % |
| Hybrid Star Battle Series (001) - Tapa-like Loop by BenceJoful (on 8. January 2023, 07:42) | 29 | 92 % |
| Discontinuity? by JayForty (on 2. February 2024, 16:38) | 88 | 96 % |
