(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 | |
|---|---|---|---|
 | 15 Decibels by JeremyDover (on 28. August 2022, 03:00) | 25 |  91 % |
| Puzzle Plaza (relative clones + cipher sudoku) by Aspartagcus (on 16. October 2022, 11:41) | 27 | 94 % |
| Diversity 2 by Migu (on 15. February 2023, 20:08) | 51 | 90 % |
| This One Goes To Twelve by Blashyrkh (on 22. March 2023, 22:43) | 23 | 92 % |
| Lux Umbra (Anti/Quadruples, Numbered Rooms) by Crusader175 (on 4. July 2023, 19:00) | 61 | 96 % |
| Having A Goodlaugh by HalfBakedLunatic (on 3. December 2023, 02:38) | 48 | 91 % |
| Companies (Skyscraper, Product Ltd) by Crusader175 (on 5. December 2023, 14:00) | 21 | 97 % |
| ⬯⬮⬯ Entropic-Sequence-Loop ⬮⬯⬮ (Easter Edition) by ElChiglia (on 30. March 2024, 07:15) | 21 | 93 % |
| One of these things (is not like the others) by Jrosas (on 4. April 2024, 13:44) | 22 | 93 % |
| The Edge of Reason by Abdul the Killer (on 7. May 2024, 12:34) | 22 | 93 % |
| Bittersweet Candies 4 - A (Mostly) Regular 6x6 Sudoku Pack (reworked) by Playmaker6174 (on 22. May 2024, 01:30) | 19 | 98 % |
| Pentominous U-Bahn (Warm-up #2) by KNT (on 15. November 2024, 09:15) | 38 | 100 % |
| Slingshot Full Rank Fillomino by Piatato (on 27. December 2024, 18:38) | 21 | 100 % |
| Interlinked by oklux (on 8. January 2025, 11:11) | 22 | 93 % |
| In & out fillings (Flinty Collab) by palpot (on 14. January 2025, 15:00) | 18 | 93 % |
| Synergy by Joseph nehme (on 7. August 2021, 08:11) | 75 | 95 % |
| Zoom by matt383 (on 22. March 2023, 13:49) | 77 | 95 % |
| Quiet, please! (renban whispers sudoku) A.k.a. "The Pipe" by Lizzy01 (on 18. August 2022, 20:51) | 51 | 98 % |
| Extragalactic by zegres (on 8. January 2024, 04:49) | 85 | 98 % |
| Jigsaw Sudoku II by Richard (on 17. March 2009, 14:44) | 120 | 90 % |
