(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 | |
|---|---|---|---|
 | Candles in the Dark by Dave Sandwich (on 22. November 2022, 23:44) | 71 |  92 % |
| 5 Years Portal Anniversary by Richard (on 1. November 2013, 12:02) | 94 | 98 % |
| Kreuzzahlrätsel (4) by berni (on 21. October 2010, 11:57) | 42 | 91 % |
| Wichtel 2018 (8): Zahlenweihnachtsbaum by wichtel (on 24. December 2019, 12:08) | 31 | 96 % |
| Adventssterne: Full Rank Star by Realshaggy (on 15. December 2019, 06:00) | 32 | 91 % |
| Median Quads by RockyRoer (on 13. November 2021, 05:07) | 21 | 92 % |
| 真笑Puzzles046--Chaos Construction--ZhangYi005 by cdwg2000 (on 13. March 2022, 00:50) | 20 | 97 % |
| Chaos Construction: Arukone by Dandelo (on 17. April 2022, 01:27) | 22 | 96 % |
| When-in-drome by Mojo872 (on 20. April 2022, 03:41) | 23 | 94 % |
| Regional Variants (ambiguous region sum lines) by AnalyticalNinja (on 4. June 2022, 02:54) | 39 | 97 % |
| Shyscrapers by Lisztes (on 25. July 2022, 23:30) | 30 | 100 % |
| Die Kryptos - S05E02: Teilchenzoo by tuace (on 1. September 2022, 20:22) | 20 | 99 % |
| Entropic Tiles by crispy16 (on 3. September 2022, 22:58) | 27 | 94 % |
| Puzzle Plaza (relative clones + cipher sudoku) by Aspartagcus (on 16. October 2022, 11:41) | 28 | 95 % |
| 3 Bags Full by panthchesh (on 30. January 2023, 02:17) | 25 | 93 % |
| Liar Japanese Sums #4 - Ciphered Yin Yang by Niverio (on 1. February 2023, 11:22) | 53 | 99 % |
| Rockets by igniteice (on 8. December 2023, 16:29) | 24 | 90 % |
| Whimsical Whisper Snake by starwarigami (on 27. January 2024, 00:09) | 41 | 100 % |
| Celebrating 100 by sujoyku (on 11. April 2024, 20:00) | 20 | 92 % |
| A View to a Kill by DadJokes (on 30. April 2024, 22:37) | 25 | 93 % |
