(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 | |
|---|---|---|---|
 | Coordinate Coordinate Arrows Arrows by damo_89 (on 3. January 2026, 12:20) | 63 |  96 % |
| Roller Coaster mit Extras 2 by Uhu (on 5. January 2018, 21:48) | 66 | 99 % |
| Dritter Pfeilchenstrauß by glum_hippo (on 10. September 2020, 22:00) | 23 | 96 % |
| Word Search Sudoku by Stavros96 (on 30. November 2020, 10:06) | 18 | 98 % |
| Why Can't We Be Friends? by SlowLarry (on 21. December 2020, 22:06) | 28 | 98 % |
| Pointing Pairs Fillomino by Mark Sweep (on 16. April 2021, 10:00) | 26 | 98 % |
| Double the Math - Mystery by Mad-Tyas (on 25. May 2021, 07:49) | 18 | 92 % |
| An Homage To Simon by Ronnyson (on 30. August 2021, 11:58) | 19 | 94 % |
| Walking a Nine Line (Chaos Construction) by the_cogito (on 5. February 2023, 16:19) | 43 | 96 % |
| Sandwich Boxes by Ennead (on 8. June 2023, 20:31) | 33 | 92 % |
| Nurikabe Cousins by Agent (on 22. August 2023, 09:00) | 49 | 98 % |
| Matrix of Loopy Fireworks by Aspartagcus (on 11. April 2024, 09:38) | 31 | 96 % |
| Duet (Overlapping Tetrominous Loop) by the_cogito (on 28. June 2024, 22:34) | 16 | 100 % |
| U-Bahn with Fillomino enclosures #2 (10x10) by Jesper (on 7. November 2024, 17:49) | 37 | 99 % |
| Abstract Art by marty_sears (on 30. November 2023, 02:23) | 117 | 96 % |
| New York City by ICHTUES (on 30. April 2025, 07:50) | 126 | 97 % |
| Nashville by ICHTUES (on 19. June 2022, 06:00) | 80 | 96 % |
| Stingray (Odd) - Numbered rooms+Parity lines Sudoku by Qodec (on 11. January 2023, 23:02) | 65 | 96 % |
| Heads or Tails? by Xenonetix (on 27. July 2022, 15:51) | 42 | 99 % |
| five boxing wizards by aqjhs (on 6. January 2025, 07:53) | 50 | 91 % |
