(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 | |
|---|---|---|---|
 | Entropy miracle 13 (final) by fractalminding (on 25. April 2026, 17:19) | 39 |  90 % |
| Fully Booked [Numbered Rooms Fillomino] by MicroStudy (on 26. January 2024, 12:26) | 106 | 97 % |
| Magnet+Antimagnet-Verrückte Welt der Pole by r45 (on 11. August 2010, 16:28) | 69 | 92 % |
| Suguru Chaos Deconstruction by mathpesto (on 12. February 2022, 23:45) | 206 | 99 % |
| Full Lashing by Joseph nehme (on 1. May 2021, 08:34) | 40 | 98 % |
| Woof! by zegres (on 1. August 2022, 07:13) | 80 | 97 % |
| Yajilin Dutch Whispers by yttrio (on 7. September 2024, 01:37) | 74 | 97 % |
| Seance by mathpesto (on 17. February 2025, 23:36) | 80 | 97 % |
| U-Bahn 2 by wooferzfg (on 6. June 2025, 07:30) | 38 | 96 % |
| Bring In Da Squish by ChinStrap (on 28. April 2026, 16:52) | 35 | 93 % |
| Scattered X-Sums Sudoku (2) by Richard (on 13. June 2014, 12:00) | 78 | 93 % |
| Embedded Sandwich Sudoku - Taco Bowl by DiMono (on 8. March 2021, 06:41) | 41 | 97 % |
| ☾ 10-Suȵ Loop ☼ by ElChiglia (on 28. October 2023, 08:05) | 44 | 93 % |
| Put a ring on it (if you like it) by Ali M (on 26. March 2024, 16:32) | 50 | 94 % |
| Sorry, could you repeat that? by chrisjnap (on 25. September 2025, 00:29) | 94 | 94 % |
| The X and The V Squared: Anniversary Edition by .proxz14 (on 17. February 2026, 09:19) | 146 | 95 % |
| Kakuro-Koralle by ibag (on 5. September 2013, 23:55) | 79 | 96 % |
| LM Gapped Kakuro by yureklis (on 3. January 2011, 23:50) | 90 | 96 % |
| Knightmare on Mount Pleasant Avenue by HalfBakedLunatic (on 25. March 2024, 22:21) | 100 | 94 % |
| Product Ltd. by BoaConstructor (on 30. July 2020, 12:57) | 53 | 97 % |
