(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 | |
|---|---|---|---|
 | Living On The Edge by Scojo (on 26. November 2024, 22:35) | 13 |  92 % |
| Calamari by plasmath (on 28. December 2024, 02:00) | 14 | 92 % |
| Baby Steps by antiknight (on 7. November 2023, 23:38) | 65 | 94 % |
| Cross the Sums by abed hawila (on 13. March 2023, 12:56) | 62 | 97 % |
| The Female of the Species... by Abdul the Killer (on 5. March 2024, 12:34) | 96 | 97 % |
| Slingshot Skirmish 5 - Siege Tactics by Allagem (on 10. May 2024, 13:37) | 30 | 95 % |
| Give or Take (Yin Yang Killer) by tallcat (on 11. November 2024, 18:21) | 97 | 96 % |
| Klein aber Fies: Jigsaw Killer by Richard (on 5. March 2010, 12:00) | 69 | 91 % |
| Tapa III by yureklis (on 24. March 2010, 22:44) | 89 | 94 % |
| Mystery Killer by Phistomefel (on 22. July 2020, 20:43) | 100 | 94 % |
| Sandwich Spread by Mark Sweep (on 5. November 2020, 10:00) | 16 | 90 % |
| Checkmate Sudoku by SenatorGronk (on 21. December 2020, 16:26) | 19 | 94 % |
| Position Sums mit Kropki-Paaren by glum_hippo (on 8. February 2021, 15:41) | 30 | 98 % |
| SandwichScrapers v2 by cfop (on 26. August 2021, 19:45) | 16 | 94 % |
| Nori Nori Killer Sudoku by MavericksJD (on 29. November 2021, 02:22) | 15 | 94 % |
| Serial Locks by twototenth (on 7. December 2021, 12:46) | 14 | 90 % |
| Beacon Lighthouse (Chaos Construction - Phistomefel Tribute) by purpl (on 12. December 2021, 21:38) | 14 | 92 % |
| Berserk (slow thermo + german whispers sudoku) by Aspartagcus (on 18. March 2022, 21:28) | 19 | 92 % |
| Orb 4: It's All Gone Wrogn! by DiMono (on 14. June 2022, 20:32) | 29 | 99 % |
| Descending Madness 4 (Ambiguous Combination Constraint Arrows) by AnalyticalNinja (on 17. June 2022, 18:45) | 16 | 96 % |
