(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 | |
|---|---|---|---|
 | Angel by zetamath (on 8. August 2025, 19:50) | 101 |  96 % |
| Embark (Fog of war/Deconstruction/Killer/Yajilin) by dumediat (on 21. January 2023, 13:50) | 160 | 97 % |
| Point the Silent Path by Niverio (on 18. June 2024, 09:25) | 65 | 97 % |
| Steamed Hams by Perladel (on 12. October 2022, 13:03) | 69 | 96 % |
| For A Few Circles More (fillomino) by SkepticalMario (on 31. December 2024, 21:19) | 56 | 95 % |
| Stay in Your Box by marty_sears (on 2. February 2025, 03:58) | 188 | 97 % |
| Classic Arrow Sudoku by Phistomefel (on 11. October 2020, 09:48) | 149 | 96 % |
| Six 6x6-sudoku pack by Qodec (on 26. June 2021, 23:10) | 52 | 98 % |
| The Curse of King Minos by Allagem (on 17. November 2024, 07:06) | 141 | 97 % |
| whisperwhisperwhisperwhisper by twototenth (on 18. January 2022, 08:00) | 88 | 94 % |
| Mnmle Mgntplttn by berni (on 11. April 2016, 14:13) | 36 | 98 % |
| Mehrdeutige Rätsel - U-Bahn unter Hochhäusern by Zzzyxas (on 30. November 2019, 17:28) | 38 | 99 % |
| Antiking Kaleidoscope (Stitched Rainbow VI) by thoughtbyte (on 7. August 2022, 03:16) | 43 | 97 % |
| Cavino Royale (Canal View Nonogram) by PrimeWeasel (on 22. April 2024, 09:23) | 44 | 99 % |
| Joined Peas by ChinStrap (on 14. December 2024, 19:13) | 43 | 90 % |
| Yin Yang X-sums by flutchman (on 6. September 2025, 15:35) | 44 | 95 % |
| Do I Sing Her End? by juddimal (on 8. July 2024, 22:54) | 78 | 95 % |
| Maximus Unique by Klvsched (on 24. June 2024, 14:00) | 114 | 95 % |
| Lace Agate by Niverio (on 4. June 2023, 09:56) | 131 | 95 % |
| Tauschpfad (2) by BFaw (on 27. August 2011, 13:20) | 30 | 91 % |
