(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 | |
|---|---|---|---|
 | Klein's Foggy Glasses by DubiousMobius (on 3. October 2024, 21:43) | 25 |  96 % |
| Second Rodeo (collab. with Tallcat) by jwsinclair (on 17. October 2024, 23:06) | 68 | 98 % |
| Bonsai (Ambiguous J-Sum Yin-Yang with Doublers) by MaizeGator (on 19. November 2024, 22:45) | 33 | 100 % |
| nopil nahual by aqjhs (on 30. May 2025, 00:00) | 23 | 99 % |
| Assigned Pentominoes Loop #1 (14x18) by Playmaker6174 (on 11. February 2026, 14:00) | 20 | 99 % |
| Wanna Take This Outside? by ThePedallingPianist (on 21. December 2023, 01:09) | 88 | 100 % |
| Orbit by Qodec (on 16. September 2020, 21:38) | 72 | 99 % |
| Chaos Construction: Numbered Rooms / Skyscraper / Sandwich Length by KNT (on 4. May 2022, 07:54) | 55 | 97 % |
| Zag by grkles (on 18. March 2021, 11:46) | 47 | 98 % |
| Halligen Knapp Daneben by KNT (on 12. January 2023, 01:08) | 34 | 97 % |
| The Turtle (Renban, Entropy) by Mad-Tyas (on 28. March 2023, 09:21) | 39 | 98 % |
| Japanese Sums Narrow Cave Cipher: Mirrors (11x11) by Jesper (on 2. June 2023, 16:04) | 35 | 100 % |
| A Rose by PotatoHead21 (on 2. August 2023, 08:24) | 36 | 95 % |
| a hot summer nightmare by aqjhs (on 21. August 2025, 12:35) | 38 | 100 % |
| Roller Coaster mit Extras 25 by Uhu (on 5. March 2022, 08:36) | 24 | 99 % |
| Sunken Treasure Chaos Construction by Schwupel (on 24. July 2022, 18:58) | 26 | 97 % |
| Extreme Lunchbox 2 by Undar_Beyond (on 21. October 2020, 15:56) | 42 | 97 % |
| Sunshine by SudokuExplorer (on 26. January 2021, 02:00) | 43 | 97 % |
| Arrow Garden by PotatoHead21 (on 22. August 2021, 03:52) | 42 | 98 % |
| Zum Geburtstag: Das Geschenk by moss (on 5. October 2017, 23:58) | 30 | 99 % |
