(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 | |
|---|---|---|---|
 | Chaos Construction: Disconnected (2) by KNT (on 20. May 2024, 04:09) | 86 |  98 % |
| Wichtel 2021 (2): Der Sternenkompass by wichtel (on 1. June 2022, 21:20) | 15 | 93 % |
| LM-Übungsrätsel: No Same Sums by CJK (on 1. July 2023, 20:23) | 16 | 96 % |
| Bluth's by mathpesto (on 21. May 2023, 03:08) | 46 | 96 % |
| Rank Up 06 - Fibonacci Squishtroquadri by ThePedallingPianist (on 14. July 2024, 01:08) | 47 | 98 % |
| Beispiel für Roller Coaster mit Extras 25 by Uhu (on 3. March 2022, 06:35) | 27 | 100 % |
| Urban Sprawl by jwsinclair (on 27. July 2022, 18:56) | 35 | 97 % |
| Doppelte Adventssummen 4. Advent by Luigi (on 20. December 2015, 08:04) | 52 | 96 % |
| Wichtel 2022 (7): Kryptisches Fillominurikabe by wichtel (on 11. October 2023, 14:14) | 12 | 95 % |
| upcoming upheaval by aqjhs (on 24. February 2025, 00:00) | 24 | 91 % |
| True Equality by Manta-Ray (on 4. October 2025, 15:01) | 13 | 93 % |
| The 15-Box Odyssey by Duarte-Carvalho (on 11. October 2025, 10:00) | 35 | 90 % |
| Armored Harriers by wooferzfg (on 30. April 2023, 06:06) | 29 |  96 % |
| Killer Lunchboxes by Undar_Beyond (on 16. June 2020, 16:35) | 53 | 98 % |
| Mystery Box by Nahileon (on 2. August 2022, 22:09) | 34 | 92 % |
| Top Right Boi (Psycho look-and-say/Arrow) by dumediat (on 21. June 2025, 12:00) | 30 | 93 % |
| »Little Killer« unter Damen by glum_hippo (on 20. May 2020, 08:25) | 21 | 91 % |
| Doubles Hidden Inside Squares (Double Trouble) by Mad-Tyas (on 8. September 2021, 13:28) | 17 | 98 % |
| Three Rights and a Wrogn by SirWoezel (on 29. July 2022, 13:47) | 18 | 95 % |
| Small Phistomefel by Stoer (on 23. April 2023, 13:19) | 22 | 91 % |
