(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 | |
|---|---|---|---|
 | Kropkiflotte auf hoher See III by Luigi (on 30. October 2014, 13:51) | 19 |  94 % |
| 1-N Chaos Deconstruction: Whisper / Renban / Between by KNT (on 14. May 2022, 16:49) | 61 | 95 % |
| Goliath by Jay Dyer (on 25. July 2023, 16:03) | 43 | 98 % |
| Medusa's Lair by XeonRisq (on 5. April 2024, 20:00) | 21 | 100 % |
| Rainy Day Sudoku 12 (squared) & 35 by joecat (on 30. July 2020, 11:20) | 98 | 99 % |
| Ciphered Japanese Sums - KNT by Niverio (on 22. April 2023, 12:18) | 45 | 99 % |
| Roller Coaster mit Extras 16 by Uhu (on 5. March 2020, 07:34) | 29 | 99 % |
| Fission (Classic Thermo) by emmettcito (on 7. May 2021, 12:37) | 32 | 94 % |
| Star-Crossed Sandwiches by DarthParadox (on 25. January 2024, 01:26) | 31 | 92 % |
| Tetropolis by sfushidahardy (on 4. October 2024, 17:18) | 32 | 99 % |
| Suguru Chaos Deconstruction: The Mop (Between Lines) by crispy16 (on 26. May 2022, 20:43) | 40 | 97 % |
| Satan Whispers by damasosos92 (on 19. February 2024, 16:42) | 39 | 92 % |
| Consecutive Territories by masetab (on 23. November 2025, 03:31) | 106 | 98 % |
| Big Bad Wolf by IcyFruit (on 10. April 2025, 14:24) | 109 | 98 % |
| There is still life in my sandwich... by Sktx (on 15. May 2021, 00:49) | 19 | 94 % |
| Watermill by lerroyy (on 15. May 2022, 22:44) | 31 | 97 % |
| Knot in the Crosshairs by antiknight (on 13. December 2022, 23:40) | 32 | 95 % |
| Second Region X-Sums Chaos #2 by Elliptical (on 18. January 2023, 22:58) | 18 | 94 % |
| Sailing by ThePedallingPianist (on 15. February 2023, 00:18) | 24 | 94 % |
| A Flock of Pixels (Colourful Killers) by The Book Wyrm (on 27. August 2023, 15:56) | 17 | 98 % |
