(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 | |
|---|---|---|---|
 | Boogie by Andrewsarchus (on 21. March 2025, 05:18) | 41 |  92 % |
| A Clockwork Orange by .proxz14 (on 29. March 2025, 11:11) | 18 | 93 % |
| Noodles by Paletron (on 10. May 2024, 22:08) | 58 | 97 % |
| Renban Circus by JeffWajes (on 2. September 2024, 18:54) | 64 | 95 % |
| Agathokakological by NicoD (on 25. June 2025, 05:30) | 69 | 94 % |
| Compass Fillomino #5: Large Ring by MagnusJosefsson (on 3. September 2021, 10:59) | 39 | 96 % |
| Surgical Excision by HalfBakedLunatic (on 1. July 2023, 05:02) | 46 | 96 % |
| Ancient Tablet by Kafkapharnaum (on 25. July 2023, 15:51) | 37 | 100 % |
| Outside Killer U-Bahn by the_cogito (on 8. July 2025, 17:16) | 37 | 99 % |
| WPC Preparation 2019: Loopfinder by pwahs (on 3. January 2021, 16:23) | 17 | 93 % |
| Poison Arrow 2 by FryTheGuy (on 13. May 2021, 04:04) | 19 | 93 % |
| Regional Chess Sums: A Proper Introduction by Nordy (on 24. January 2022, 09:30) | 16 | 95 % |
| Die Kryptos - S05E04: Zelte und Bäume by tuace (on 1. September 2022, 20:22) | 15 | 98 % |
| LM-Quali 2023 Leftover: Hashiwokakero by CJK (on 12. March 2023, 20:23) | 17 | 95 % |
| Crossroads by Knickolas (on 3. April 2023, 13:12) | 33 | 97 % |
| Double Killer Sudoku by clover (on 15. December 2023, 21:57) | 35 | 99 % |
| Regionometers by ThePedallingPianist (on 20. February 2024, 13:20) | 33 | 96 % |
| Di-agony! by ThePedallingPianist (on 24. November 2022, 17:07) | 73 | 97 % |
| Japanese Slitherlink by KNT (on 27. October 2024, 22:43) | 51 | 97 % |
| Meidjuluk II (N=25) by glum_hippo (on 1. June 2023, 00:00) | 56 | 100 % |
