(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 | |
|---|---|---|---|
 | Take Out 2 by Ennead (on 16. July 2023, 21:36) | 18 |  100 % |
| Japanese Products Sudoku by RockyRoer (on 6. November 2023, 12:00) | 45 | 93 % |
| Interchangeable by palpot (on 2. April 2024, 00:16) | 27 | 96 % |
| Naitrular by Taky (on 13. June 2024, 11:40) | 22 | 92 % |
| Something something lines by filuta (on 7. September 2024, 08:56) | 19 | 94 % |
| German Whispers Delux by Justalilguy (on 20. February 2025, 15:55) | 22 | 97 % |
| Five Arrows (Entropy) by Mad-Tyas (on 24. October 2023, 12:48) | 63 | 93 % |
| Orbital Killer by Realshaggy (on 22. August 2020, 14:29) | 52 | 99 % |
| Yin Yang FSOE by flutchman (on 9. November 2025, 10:34) | 98 | 95 % |
| AAAAAAAAA (Cipher Numbered Rooms) by tesseralis (on 8. July 2022, 10:06) | 36 | 94 % |
| Limitless Potential #1: Zero to Infinity by Playmaker6174 (on 23. April 2023, 09:53) | 40 | 98 % |
| The Friendly Knights by Bert (on 13. February 2024, 05:07) | 38 | 94 % |
| First Rodeo (chaos construction) by jwsinclair (on 28. September 2024, 23:49) | 85 | 97 % |
| Circled X-Sums by RockyRoer (on 22. February 2023, 12:30) | 70 | 97 % |
| Sudomino by Prof.Dori (on 26. February 2024, 14:27) | 70 | 98 % |
| 1234 (Arrow Sudoku) by ProRock (on 24. June 2024, 15:21) | 31 | 90 % |
| Somewhere Over The Rainbow by ICHTUES (on 30. May 2021, 06:00) | 51 | 96 % |
| Cutting Corners (by jovi_al & Qodec) by Qodec (on 4. September 2021, 10:44) | 53 | 97 % |
| Tag 20 - Shakashaka by CJK (on 11. February 2021, 14:56) | 30 | 95 % |
| Optimization by djorr (on 23. June 2021, 16:10) | 19 | 97 % |
