(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 | |
|---|---|---|---|
 | Decompression [TSL][S1T6] by jwsinclair (on 18. July 2025, 23:22) | 49 |  95 % |
| Skyscraper^2 Sudoku by Prasanna16391 (on 5. August 2020, 13:47) | 25 | 99 % |
| Encaged Kropki #2 - oops! no cage totals! by RockyRoer (on 21. October 2020, 00:00) | 22 | 99 % |
| Wichtel 2021 (10): Eine lange Reise by wichtel (on 8. November 2022, 02:12) | 20 | 99 % |
| C.C. Geass by lerroyy (on 8. August 2022, 04:00) | 46 | 99 % |
| Unendliches Höhlenrätsel (Infinity Cave) by Phistomefel (on 3. April 2023, 20:00) | 27 | 91 % |
| Bouquet by Myxo (on 15. September 2023, 10:41) | 95 | 98 % |
| Round n Round with Doppelgangers by bodemeister (on 14. February 2024, 11:41) | 23 | 93 % |
| Stolen Numerals XV*V by NurglesGift (on 9. August 2024, 20:17) | 81 | 91 % |
| XY-Cages IV by glum_hippo (on 18. January 2026, 07:55) | 31 | 90 % |
 | Zoomies (Copycat/X-Sums) by damo_89 (on 9. May 2026, 15:00) | 23 | 95 % |
| Four Colour Theorem by Jay Dyer (on 19. March 2022, 13:12) | 122 | 97 % |
| Chaos Arrows by Sotehr (on 27. September 2024, 15:19) | 53 | 93 % |
| Adorable Fury by DiMono (on 5. October 2021, 17:30) | 22 | 94 % |
| Galactic Aquariums (Spiral Galaxy Aquarium hybrid) by AnalyticalNinja (on 17. August 2023, 01:04) | 20 | 96 % |
| Whispering Tapa-logy by yttrio (on 19. January 2024, 22:10) | 37 | 97 % |
| Schrödinger's Knights by lepton (on 9. March 2024, 11:50) | 19 | 93 % |
| Tentropic Terrier by Scojo (on 11. June 2025, 20:06) | 22 | 97 % |
| [TSL][S1T6] Across the Stars by The Book Wyrm (on 30. July 2025, 17:07) | 23 | 99 % |
| Fold-In Hexuro by Nell Gwyn (on 30. October 2025, 04:09) | 20 | 94 % |
