(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 | |
|---|---|---|---|
 | Beacons and Towers by Elliptical (on 18. September 2022, 21:21) | 23 |  97 % |
| Consecutive Ladder by Cane_Puzzles (on 17. January 2023, 09:33) | 52 | 98 % |
| Filloku by mormagli (on 8. September 2023, 20:38) | 23 | 96 % |
| Quantum Balance (by gdc?) by gdc (on 19. September 2025, 17:38) | 46 | 99 % |
| Read Peatween The Lines by .proxz14 (on 17. January 2026, 10:53) | 22 | 92 % |
| Crypto Snake Pit by KNT (on 23. December 2025, 16:46) | 19 | 100 % |
| Region Sum Circus by JeffWajes (on 9. February 2026, 10:24) | 77 | 96 % |
| Split Dimensions by kingoffries (on 25. February 2026, 21:30) | 23 | 91 % |
| The Sword by Qodec (on 22. November 2020, 19:59) | 77 | 96 % |
| The Facehugger by sonicbyte (on 12. December 2020, 23:30) | 35 | 96 % |
| Subway Buddies by Niverio (on 9. August 2024, 13:03) | 37 | 97 % |
| Triangle Inequality by Kaktuslav (on 7. December 2025, 08:00) | 36 | 91 % |
| The Four Pyramids by EricRathbun (on 10. December 2022, 23:03) | 57 | 96 % |
| Caves can hide secrets by cornish-john (on 8. February 2026, 17:45) | 53 | 94 % |
| A Mathematical Phenomenon by Xenonetix (on 4. September 2022, 22:22) | 121 | 99 % |
| Odd/Even Killer Sudoku (#4) - No given cage totals by Mr.Menace (on 30. November 2020, 22:25) | 17 | 96 % |
| 100 Streams of Zetatude (renban, region sum, doublers) by Chilly (on 18. October 2022, 18:23) | 16 | 94 % |
| Wendezäune by Prof.Dori (on 24. March 2026, 00:07) | 51 | 92 % |
| Chaos Construction - Border Relations by Niverio (on 3. May 2024, 12:35) | 104 | 98 % |
| pin7guin loves ABCtjes too by ibag (on 6. September 2017, 00:00) | 24 | 92 % |
