(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 | |
|---|---|---|---|
 | Palindrome Sandwiches by RockyRoer (on 13. March 2021, 12:26) | 29 |  99 % |
| There's Something Off in This Sandwich by RockyRoer (on 8. April 2023, 21:08) | 35 | 99 % |
| Clockwork Yajilin: Parity Point by wisty (on 28. February 2024, 01:00) | 28 | 97 % |
| Psst, I'm in the Loop by Calvinball (on 9. July 2024, 15:15) | 61 | 95 % |
| Snails in the Corners by Md88keys (on 18. October 2025, 16:56) | 34 | 95 % |
| Balancing Act (AnalyticalNinja+Palpot collaboration) by AnalyticalNinja (on 29. October 2024, 15:17) | 67 | 97 % |
| Dominobrücken (Teil 3) by Zzzyxas (on 26. October 2015, 19:55) | 38 | 94 % |
| Grand-Prix 2019 Leftover: Regionales Yajilin by JonaS2010 (on 13. March 2020, 18:19) | 44 | 93 % |
| The XV Killers (XV Series #1) by Stavros96 (on 14. September 2020, 16:00) | 39 | 97 % |
| Naughty Negative Snake by starwarigami (on 6. March 2024, 00:00) | 39 | 91 % |
| rAwro | Chaos 9x9 by Taeqle (on 1. October 2024, 00:04) | 41 | 90 % |
| Carouselambra by kuraban (on 16. November 2025, 05:30) | 45 | 90 % |
| Thermal Nights by abed hawila (on 24. April 2021, 20:29) | 180 | 98 % |
| Butterfly Effect (Renban Between Lines Sudoku) by Phistomefel (on 6. February 2023, 22:33) | 175 | 98 % |
| 0123-Rätsel (4) by BFaw (on 16. June 2016, 10:00) | 39 | 92 % |
| Wichtel 2017 (11): Doppelte japanische Summen (mit Baukasten) by wichtel (on 11. December 2018, 09:05) | 44 | 96 % |
| Chaos Construction: Renbans by XeonRisq (on 11. August 2022, 05:00) | 55 | 92 % |
| Stranger in a Strange Land by Wuschel (on 24. February 2025, 10:58) | 149 | 99 % |
| Colours in the (k)night XII by Villse (on 14. September 2025, 16:57) | 127 | 96 % |
| The Thing by mathpesto (on 16. October 2022, 04:48) | 52 | 91 % |
