(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 | |
|---|---|---|---|
 | Rätselkombi by Luigi (on 19. July 2010, 13:10) | 59 |  94 % |
| Glückwünsche vom Orion by Statistica (on 9. July 2019, 00:55) | 25 | 100 % |
| Roller Coaster mit Extras 19 by Uhu (on 17. July 2020, 08:45) | 27 | 98 % |
| Valve by Lisztes (on 12. June 2021, 01:00) | 32 | 92 % |
| Antiknight Killer Sudoku 2 by PotatoHead21 (on 6. November 2022, 01:25) | 29 | 91 % |
| Chaos Construction 1 (Little Killer) by Jeet Sampat (on 21. December 2022, 17:33) | 31 | 95 % |
| Arrows by psninn (on 13. May 2024, 13:03) | 29 | 92 % |
| Mambo by zetamath (on 6. September 2024, 00:16) | 31 | 97 % |
| The Answer to the Ultimate Question by ViKingPrime (on 11. October 2024, 20:30) | 87 | 97 % |
| Border Vision by wooferzfg (on 15. April 2022, 03:53) | 39 | 97 % |
| Anti-Knight Thermos 2 by Jeet Sampat (on 4. January 2023, 10:47) | 82 | 98 % |
| Gerade Ungerade TaKo by tuace (on 22. March 2014, 10:30) | 44 | 98 % |
| Adventskalender 2020, Türchen 12 - Landvermessung by Zzzyxas (on 12. December 2020, 07:00) | 56 | 97 % |
| Red Square Blue Square by marty_sears (on 7. June 2023, 17:29) | 58 | 97 % |
| More by TotallyNormalCat (on 4. September 2021, 22:30) | 79 | 98 % |
| Quintuple skyscrapers by zorant (on 6. December 2019, 12:20) | 30 | 95 % |
| Yes, The Clever Equation by SSG (on 28. September 2021, 07:07) | 29 | 95 % |
| Interjunction by MavericksJD (on 8. January 2022, 05:47) | 21 | 94 % |
| Battle With The Archers 27: Between Friends and Enemies (part 1) by Playmaker6174 (on 5. February 2022, 11:49) | 42 | 98 % |
| The Sudokutown Murders by Nordy (on 19. February 2022, 04:40) | 62 | 99 % |
