(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 | |
|---|---|---|---|
 | Leakage by Testarossa (on 21. January 2023, 20:10) | 78 |  100 % |
| Anti Minesweeper Chaos by Polycarp (on 29. April 2023, 20:24) | 32 | 93 % |
| Arrow Replica Addition by PotatoHead21 (on 30. April 2023, 17:34) | 22 | 91 % |
| Wichtel 2022 (1): Die Neue Karte von Krakatau by wichtel (on 22. June 2023, 08:08) | 14 | 96 % |
| Split Decision by ViKingPrime (on 30. August 2023, 04:42) | 22 | 97 % |
| On The Bottom Shelf (Nabner Modifier Sudoku) by Silverstep (on 9. September 2023, 00:24) | 17 | 95 % |
| Adventskalender 2023, Türchen 13 - Transparentes Yajilin by Zzzyxas (on 13. December 2023, 07:00) | 40 | 94 % |
| Bonzo's Montreux by kuraban (on 22. December 2023, 21:35) | 38 | 91 % |
| Entropy X-Sums by Mad-Tyas (on 30. January 2024, 10:12) | 64 | 94 % |
| 440 Hz by HalfBakedLunatic (on 19. March 2024, 02:38) | 27 | 93 % |
| Why sooo serious ? [2T1L Deconstruction] by Christounet (on 25. April 2024, 22:59) | 32 | 92 % |
| Yin-Yang Renbanominos 1 by Die Hard (on 29. April 2024, 07:56) | 24 | 92 % |
| ABC-Box Hybrid 1.2: A Beautiful Cave (12x12) by Playmaker6174 (on 10. June 2024, 08:30) | 31 | 100 % |
| 4321 (Palindrome XV) by ProRock (on 7. July 2024, 17:25) | 16 | 90 % |
| The Fillomino Frog by Die Hard (on 7. January 2025, 10:49) | 20 | 97 % |
| BERLIN - Buchstabenrätsel / Letter Puzzle by DocLogic (on 2. February 2025, 17:57) | 24 | 95 % |
| The Wall by juggler (on 5. June 2025, 19:37) | 116 | 99 % |
| Directed Entropy by egubachu (on 11. June 2025, 22:11) | 19 | 90 % |
| The Nuts by juggler (on 8. July 2025, 23:44) | 46 | 95 % |
| [PAC] Castle Wall (Knapp-Daneben) by The Book Wyrm (on 14. September 2025, 23:41) | 17 | 96 % |
