(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 | |
|---|---|---|---|
 | Pincer Movements by arbitrary (on 17. May 2024, 00:49) | 80 |  94 % |
| TetromUNO by yanggang (on 30. May 2024, 20:09) | 30 | 95 % |
| Torn Apart by Black_Doom (on 18. August 2024, 11:58) | 55 | 96 % |
| Across Roads (Deconstruction) by Sotehr (on 6. January 2025, 19:55) | 53 | 98 % |
| Killeriana: Ungleichungskiller by Pyrrhon (on 8. October 2009, 14:35) | 91 | 96 % |
| Spring Latch by Qodec (on 13. October 2023, 22:07) | 74 | 95 % |
| HALLOWEEN - gruseliges Buchstabenrätsel by DocLogic (on 24. October 2020, 13:13) | 41 | 99 % |
| ABC-Box Skyscraper - From A Window by DiMono (on 18. August 2021, 18:58) | 40 | 99 % |
| Times Square by grkles (on 5. November 2021, 16:56) | 38 | 94 % |
| 2-knight by fritzdis (on 21. March 2022, 20:40) | 45 | 91 % |
| Cornerstones by Jagga (on 26. November 2022, 09:06) | 40 | 98 % |
| *100* Doppelter Pentomino-Rundweg by Richard (on 17. June 2009, 21:00) | 97 | 95 % |
| Black Rose by TotallyNormalCat (on 23. July 2022, 19:00) | 104 | 96 % |
| Gouge Away by mathpesto (on 7. April 2024, 17:31) | 142 | 97 % |
| Die Kryptos - S03E04: Summon by tuace (on 30. October 2018, 10:14) | 49 | 99 % |
| Pocket Sandwich Sudoku by Genomico (on 1. November 2020, 20:25) | 16 | 92 % |
| Boba by grkles (on 20. April 2021, 18:28) | 30 | 94 % |
| Anti-Sudoku by HawkAvatar (on 21. June 2021, 14:02) | 14 | 98 % |
| (anti) R5nban Arrow Windoku by Jeroen Panda (on 29. July 2021, 09:44) | 16 | 98 % |
| Kyūdō by thoughtbyte (on 23. September 2021, 04:49) | 17 | 90 % |
