(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 | |
|---|---|---|---|
 | Theorist's Key Change by Tyrgannus (on 14. November 2021, 21:04) | 20 |  90 % |
| Superfuzzy Arrows 2 by Realshaggy (on 19. November 2021, 07:05) | 28 | 95 % |
| Triplets by jovi_al (on 22. November 2021, 22:32) | 45 | 92 % |
| 12/24 by timp1343 (on 24. December 2021, 06:24) | 18 | 94 % |
| Parity-Linked Fillomino & Slitherlink by SudokuExplorer (on 30. December 2021, 00:00) | 30 | 96 % |
| Sauron's Demise by XeonRisq (on 19. January 2022, 04:00) | 20 | 92 % |
| Chaotic Arrows by mathpesto (on 28. January 2022, 21:20) | 90 | 96 % |
| Kill Kill Kill Kill Kill by Jeet Sampat (on 12. February 2022, 23:52) | 31 | 95 % |
| Coordinate Chaos by grkles (on 13. February 2022, 06:38) | 60 | 97 % |
| Reunited by sunnyjum (on 19. February 2022, 10:22) | 15 | 98 % |
| The Lost Lockout Scroll by riffclown (on 4. March 2022, 01:00) | 26 | 98 % |
| Kylo Ren by starwarigami (on 30. March 2022, 02:42) | 47 | 97 % |
| Archer's Entropy 2: Protection by Mad-Tyas (on 6. April 2022, 16:56) | 37 | 93 % |
| Japanische Summen mit 59 by ibag (on 20. April 2022, 23:59) | 33 | 99 % |
| 1K Sums by mathpesto (on 20. April 2022, 02:41) | 74 | 99 % |
| Clothrax by grkles (on 20. April 2022, 06:27) | 18 | 93 % |
| Chaos Construction: Quads by XeonRisq (on 23. April 2022, 18:00) | 40 | 90 % |
| Incendiary Arrows by Miky (on 24. April 2022, 17:32) | 26 | 99 % |
| Build Your Own Killer: Moral Dilemmas by Playmaker6174 (on 6. May 2022, 19:02) | 32 | 99 % |
| Dania: Uncharted Territories by antiknight (on 7. May 2022, 19:04) | 37 | 96 % |
