(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 | |
|---|---|---|---|
 | [50 Puzzles Celebration] Double Trouble Entropy by Mad-Tyas (on 30. January 2022, 03:49) | 39 |  100 % |
| Time to Color by EricRathbun (on 16. October 2022, 21:17) | 24 | 94 % |
| Double Agent by DadJokes (on 29. September 2022, 21:48) | 31 | 94 % |
| SneX by JayForty (on 17. March 2023, 20:28) | 19 | 91 % |
| That's Three In The Center by .proxz14 (on 7. June 2025, 09:21) | 52 | 96 % |
| Even knights fear arrows by Phistomefel (on 19. November 2020, 19:09) | 106 | 96 % |
| Warp Speed Factor 4 by The Bard (on 5. January 2026, 02:55) | 73 | 95 % |
| Count me out ! [Deconstruction] by Christounet (on 14. April 2023, 01:18) | 52 | 99 % |
| Little Kropkiller by Mark Sweep (on 13. November 2020, 10:00) | 44 | 96 % |
| For your big heart with lots of room by tenaliraman (on 12. February 2021, 12:45) | 45 | 97 % |
| Pointed Knights by PotatoHead21 (on 3. March 2022, 08:30) | 50 | 95 % |
| Falscher Krypto-Rundweg by lupo (on 15. June 2009, 19:24) | 60 | 94 % |
| Embraced by Qodec (on 6. November 2020, 18:56) | 77 | 97 % |
| Distant Neighbors by Knickolas (on 21. November 2025, 00:54) | 32 | 94 % |
| Mondrian's Revenge by jsnell (on 3. February 2026, 13:46) | 36 | 95 % |
| Heterochromia (Killer Sudoku) by emmettcito (on 30. March 2021, 00:42) | 62 | 97 % |
| Key Performance Parameters by NotThatItMatters (on 13. June 2024, 20:23) | 26 | 92 % |
| Emergence by Jay Dyer (on 27. May 2024, 00:01) | 109 | 97 % |
| The 12 Regions of Christmas by IcyFruit (on 15. December 2023, 10:37) | 62 | 96 % |
| JOKER - Buchstabenrätsel / Letter Puzzle by DocLogic (on 28. April 2023, 14:03) | 34 | 94 % |
