(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 | |
|---|---|---|---|
 | J-Sum Country Chaos by Cephalo (on 23. June 2023, 10:00) | 28 |  98 % |
| Japanese Forest Walk (2) by KNT (on 13. November 2025, 15:18) | 33 | 98 % |
| Multi-sudoku: Orb 2 by DiMono (on 23. April 2021, 07:58) | 30 | 97 % |
| Fission (Classic Thermo) by emmettcito (on 7. May 2021, 12:37) | 31 | 96 % |
| Even Small Prime by FryTheGuy (on 13. December 2021, 16:28) | 29 | 99 % |
| Archery Target by Nahileon (on 24. April 2022, 15:48) | 43 | 97 % |
| Manifold Paths (Advanced Black Hole) by heliopolix (on 16. June 2023, 02:14) | 15 | 100 % |
| Manhattan by wooferzfg (on 17. August 2023, 02:49) | 27 | 98 % |
| Cryptic Shaders by wooferzfg (on 27. January 2024, 09:27) | 12 | 100 % |
| Toil and Trouble by Scojo (on 30. May 2025, 22:45) | 28 | 95 % |
| Blue Prince by vfig (on 21. June 2025, 06:34) | 15 | 92 % |
| Ʈɦᶒ Horoloɠᶖᶙḿ by ViKingPrime (on 2. August 2025, 00:00) | 15 | 100 % |
| Welcome to Chaconopia (Chaos Construction) by Mad-Tyas (on 16. August 2025, 13:24) | 16 | 96 % |
| Bizarro-doku (w/ MathGuy_12) by ThePedallingPianist (on 24. October 2025, 21:24) | 35 | 95 % |
| Wichtel 2017 (8): Ein rätselhaftes Experiment by wichtel (on 17. August 2018, 03:05) | 38 | 100 % |
| Fillomenon by DarthParadox (on 2. October 2023, 19:14) | 134 | 97 % |
| Das Prinzip der Polarität by tuace (on 3. September 2017, 17:16) | 25 | 96 % |
| Miracle Clones [Tribute to Botaku] by Undar_Beyond (on 10. November 2020, 20:34) | 33 | 91 % |
| Japanese Sums Cave Cipher - KNT by ONeill (on 27. August 2024, 12:49) | 29 | 99 % |
| Missile Command by Xenonetix (on 13. July 2022, 00:44) | 37 | 96 % |
