(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 | |
|---|---|---|---|
 | Suguru Chaos Deconstruction #2: Kropki Edition by mathpesto (on 16. February 2022, 03:51) | 160 |  99 % |
| 5-Stern-Star-Battle by CJK (on 2. July 2021, 10:17) | 42 | 94 % |
| Middle Ground by Qodec (on 10. August 2021, 15:53) | 41 | 90 % |
| Paradox by Xenonetix (on 5. June 2022, 01:11) | 32 | 96 % |
| Doom Loop (Filloku #6) by mormagli (on 12. November 2023, 17:30) | 39 | 98 % |
| Orla The Octopus by ThePedallingPianist (on 9. February 2024, 19:41) | 39 | 98 % |
| Leaving the Basement (U-Bahn) by the_cogito (on 16. October 2024, 18:29) | 40 | 100 % |
| Two's Company, Three's a Crowd by Morisenseiisgod (on 26. October 2025, 09:57) | 41 | 94 % |
| Pastiche by zetamath (on 4. November 2022, 00:18) | 97 | 95 % |
| Boxes Clash by Niverio (on 1. May 2022, 09:43) | 51 | 98 % |
| Kropki Arrow Sandwich (Merry Christmas PhilTheHat!) by RockyRoer (on 22. January 2025, 15:01) | 48 | 94 % |
| DEF Hochhaus anders rum by Luigi (on 13. July 2011, 08:47) | 23 | 93 % |
| Rätselmix kryptisch by AI1463 (on 9. July 2015, 00:00) | 33 | 99 % |
| KUCHEN - buntes Buchstabenrätsel / colorful letter puzzle by DocLogic (on 6. January 2020, 11:29) | 35 | 94 % |
| Find the Triplet by Mesmer (on 24. February 2020, 23:14) | 35 | 92 % |
| Average Arrows (mit Thermometern) by glum_hippo (on 18. January 2021, 22:17) | 23 | 96 % |
| Hopscotch by Ish_but_the_1st_time (on 28. February 2021, 20:36) | 17 | 90 % |
| 9 Arrows and 2 Givens (Arrow Sudoku) by Cane_Puzzles (on 9. July 2021, 19:30) | 12 | 93 % |
| Palindrome Killer 101 by Cane_Puzzles (on 8. August 2021, 19:01) | 27 | 91 % |
| Renban Rocket by the_cogito (on 3. January 2022, 18:20) | 52 | 96 % |
