(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 | |
|---|---|---|---|
 | Mislabeled Killers by CaptZebraCakes (on 27. June 2024, 04:35) | 144 |  98 % |
| City of Nomura (Zipper Lines/Skyscraper) by Tyrgannus (on 27. July 2025, 03:21) | 31 | 92 % |
| Sudoku Variants Series (406) - Cold Arrows by Richard (on 10. January 2025, 12:00) | 101 | 93 % |
| Sum Set Sudoku by Genomico (on 11. May 2021, 00:00) | 26 | 99 % |
| Beep Beep (Killer/German Whispers/Renban/Between Lines) by dumediat (on 18. May 2022, 23:28) | 31 | 93 % |
| Parity Sum Lines Sudoku by Agent (on 16. August 2022, 09:00) | 52 | 96 % |
| Candy Craze by Niverio (on 5. August 2023, 11:58) | 81 | 96 % |
| Heat Stroke by juggler (on 17. January 2024, 01:32) | 89 | 95 % |
| Take U-Turns by Black_Doom (on 20. March 2024, 04:35) | 52 | 96 % |
| Twister by Prof.Dori (on 22. May 2024, 14:06) | 54 | 91 % |
| Evolution by grkles (on 10. March 2023, 12:16) | 77 | 91 % |
| Rätselwochenende: Table for Four - Easy as Pentomino by uvo (on 26. November 2014, 16:40) | 39 | 93 % |
| Nos482 by starwarigami (on 27. November 2024, 01:51) | 45 | 93 % |
| Rundweg - Vertauschte Nachbarn by Calavera (on 28. June 2009, 13:47) | 74 | 93 % |
| Numbered Walls by Niverio (on 21. July 2022, 23:57) | 72 | 100 % |
| Corner Pockets by thoughtbyte (on 6. September 2022, 21:07) | 80 | 95 % |
| Mods, Quads & Odds by ThePedallingPianist (on 15. October 2023, 22:19) | 96 | 98 % |
| Sudoku Variants Series (275) - Confetti Sums Sudoku by Richard (on 1. July 2020, 00:00) | 110 | 99 % |
| 24 Rätsel in 24 Stunden (Teil 14) - Fillomino by Zzzyxas (on 24. June 2017, 13:24) | 85 | 92 % |
| UNPROBLEMATISCH - Buchstabenrätsel by DocLogic (on 1. January 2020, 13:06) | 49 | 92 % |
