(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 | |
|---|---|---|---|
 | Richard's Bouncy Castle Birthday Party by Lizzy01 (on 23. February 2025, 00:55) | 31 |  97 % |
| Zodiac-Killer VI : Virgo by Eisbär (on 8. September 2011, 23:56) | 61 | 96 % |
| Double Chillomino by mathpesto (on 18. April 2024, 01:31) | 68 | 100 % |
| I'll Cry If I Want To by FullDeck-Missing (on 30. March 2023, 16:32) | 122 | 95 % |
| Runic Chaos by Sprechta (on 8. August 2023, 20:13) | 30 | 96 % |
| Webstuhl by GemmaOane (on 14. September 2023, 21:35) | 43 | 90 % |
| 2024 con un drum (Sudoku) by glum_hippo (on 5. January 2024, 17:19) | 32 | 93 % |
| Wreathe (Dual Masyu/Yin Yang) by dumediat (on 3. March 2024, 00:00) | 36 | 97 % |
| Konami Code by TotallyNormalCat (on 10. March 2021, 23:30) | 97 | 98 % |
| Herringbone by Qodec (on 26. October 2021, 18:02) | 91 | 99 % |
| Rätselwochenende 2013: Rätselkreis by pwahs (on 13. March 2013, 18:30) | 59 | 99 % |
| It being a weekend...(Disjoint Arrows Sudoku) by glum_hippo (on 15. August 2021, 05:00) | 32 | 96 % |
| Roller Coaster mit Extras 24 by Uhu (on 5. October 2021, 14:00) | 28 | 99 % |
| Frankenstein by PotatoHead21 (on 6. November 2021, 13:40) | 28 | 97 % |
| Battle With The Archers - The Lost Puzzle: Partition by Playmaker6174 (on 29. January 2022, 18:05) | 30 | 98 % |
| The Miraculous Vault Construct by Xenonetix (on 23. March 2022, 13:15) | 27 | 99 % |
| Region Sums Sandwich by RockyRoer (on 9. April 2022, 13:56) | 32 | 95 % |
| The 8th Room by antiknight (on 24. July 2022, 22:50) | 33 | 95 % |
| Infrared [Sum Detector Fillomino] by MicroStudy (on 24. March 2023, 20:45) | 56 | 100 % |
| Waves by antiknight (on 7. April 2023, 03:07) | 30 | 91 % |
