(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 | |
|---|---|---|---|
 | Demolition (Numbered Rooms, Skyscraper) by Crusader175 (on 15. January 2023, 15:00) | 19 |  92 % |
| Guidelines by DarthParadox (on 3. July 2023, 08:11) | 18 | 96 % |
| Ice Cave by Agent (on 21. November 2023, 09:00) | 47 | 99 % |
| Fillominoku by jsmirob (on 15. December 2023, 02:40) | 21 | 94 % |
| Konferenz der Hellseher (Sudoku) by glum_hippo (on 22. March 2024, 05:05) | 27 | 91 % |
| SMOG - Buchstabenrätsel / Letter Puzzle by DocLogic (on 4. May 2024, 13:16) | 29 | 95 % |
| Region Sum Tangram by sfushidahardy (on 7. July 2024, 19:57) | 21 | 94 % |
| Widdershins by kuraban (on 25. August 2024, 13:01) | 19 | 94 % |
| Flansch (Sudoku mit Durchschnittswerten) by glum_hippo (on 30. June 2025, 19:30) | 32 | 94 % |
| Blueshift by ralphwaldo1 (on 6. September 2025, 22:05) | 20 | 92 % |
| Seeing Double by Sedum (on 13. February 2026, 23:31) | 13 | 90 % |
| Broken Fence by Myxo (on 2. December 2022, 01:16) | 96 | 98 % |
| A Symmetry by twototenth (on 1. November 2022, 08:00) | 82 | 98 % |
| Tatamidoku by mathpesto (on 21. June 2023, 04:41) | 92 | 97 % |
| Ripped Out by Black_Doom (on 28. July 2025, 16:18) | 83 | 96 % |
| Threads of Silence by Prof.Dori (on 21. September 2025, 02:51) | 63 | 93 % |
| Gravity by jovi_al (on 19. May 2021, 19:16) | 115 | 97 % |
| Ten - Qodec Collab by the_cogito (on 6. May 2022, 19:39) | 43 | 94 % |
| The Quiet Whispers Between Loops by Jolly Rogers (on 30. September 2024, 20:28) | 45 | 94 % |
| The clock by NicoD (on 28. July 2025, 05:30) | 49 | 92 % |
