(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 | |
|---|---|---|---|
 | Parity-Linked Fillomino & Slitherlink by SudokuExplorer (on 30. December 2021, 00:00) | 29 |  96 % |
| A Bright Idea by SenatorGronk (on 5. January 2022, 01:55) | 29 | 93 % |
| Violet Owl by Tyrgannus (on 18. January 2022, 17:06) | 46 | 96 % |
| Sauron's Demise by XeonRisq (on 19. January 2022, 04:00) | 18 | 92 % |
| Chaotic Arrows by mathpesto (on 28. January 2022, 21:20) | 82 | 96 % |
| Kill Kill Kill Kill Kill by Jeet Sampat (on 12. February 2022, 23:52) | 28 | 95 % |
| Killer XL by Jeet Sampat (on 20. February 2022, 08:33) | 24 | 95 % |
| The Lost Lockout Scroll by riffclown (on 4. March 2022, 01:00) | 24 | 98 % |
| Around the World by antiknight (on 23. March 2022, 20:09) | 23 | 91 % |
| Kylo Ren by starwarigami (on 30. March 2022, 02:42) | 47 | 97 % |
| Battle With The Archers 30: Silent Threat II - Hidden Plan by Playmaker6174 (on 1. April 2022, 12:21) | 32 | 96 % |
| Archer's Entropy 2: Protection by Mad-Tyas (on 6. April 2022, 16:56) | 35 | 97 % |
| Japanische Summen mit 59 by ibag (on 20. April 2022, 23:59) | 33 | 99 % |
| Clothrax by grkles (on 20. April 2022, 06:27) | 18 | 93 % |
| Incendiary Arrows by Miky (on 24. April 2022, 17:32) | 23 | 99 % |
| Reconstructed Pentominoes by mathpesto (on 13. May 2022, 20:31) | 50 | 98 % |
| Correspondence by Jay Dyer (on 17. May 2022, 21:46) | 18 | 93 % |
| Domino Knights by Nell Gwyn (on 20. May 2022, 21:53) | 16 | 93 % |
| Ambiguous Arrows Sudoku by Jay Dyer (on 25. May 2022, 21:26) | 19 | 100 % |
| GENIAL - Buchstabenrätsel / Letter Puzzle by DocLogic (on 24. May 2022, 20:49) | 30 | 97 % |
