(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 | |
|---|---|---|---|
 | Off with their heads! (Decapitated arrow sudoku) by Aspartagcus (on 8. September 2021, 08:38) | 18 |  98 % |
| Just do the Moth! by Nahileon (on 21. December 2021, 20:43) | 22 | 94 % |
| Chromatic Quiver by Xendari (on 28. March 2022, 06:19) | 95 | 98 % |
| Tension by wooferzfg (on 19. June 2022, 08:27) | 24 | 94 % |
| The Fool's Windmill by Fool on Hill (on 15. August 2022, 18:46) | 23 | 96 % |
| 15 Decibels by JeremyDover (on 28. August 2022, 03:00) | 25 | 91 % |
| Petroglyph by DadJokes (on 7. December 2022, 19:53) | 94 | 98 % |
| Diversity 2 by Migu (on 15. February 2023, 20:08) | 52 | 90 % |
| A Day for Chaos by DarthParadox (on 31. March 2023, 20:40) | 46 | 91 % |
| Having A Goodlaugh by HalfBakedLunatic (on 3. December 2023, 02:38) | 49 | 91 % |
| One of these things (is not like the others) by Jrosas (on 4. April 2024, 13:44) | 24 | 93 % |
| Armada! Armada! by Black_Doom (on 25. May 2024, 15:15) | 19 | 91 % |
| These Aren't The Circles You're Looking For by Jay Dyer (on 7. August 2024, 00:02) | 82 | 97 % |
| Läufer Loop by Prof.Dori (on 23. September 2024, 12:17) | 41 | 99 % |
| Turbid harbinger by NicoD (on 20. June 2025, 05:30) | 65 | 96 % |
| Hurra: Zafer ist 33! by Richard (on 30. August 2012, 00:00) | 50 | 97 % |
| Extragalactic by zegres (on 8. January 2024, 04:49) | 87 | 98 % |
| A 38 II by tuace (on 4. September 2016, 17:27) | 61 | 99 % |
| Roller Coaster Krypto by Uhu (on 11. November 2016, 13:47) | 58 | 98 % |
| Broken Bow (Disjoint Arrow) by tallcat (on 2. August 2021, 21:46) | 34 | 93 % |
