(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 | |
|---|---|---|---|
 | Wichtel 2019 (11 und Schluss): Es soll nicht langweilig werden! by wichtel (on 6. November 2020, 20:01) | 18 |  100 % |
| In Between Disjoint Killings by tenaliraman (on 16. January 2021, 18:39) | 35 | 96 % |
| Cryptic Skyscrapers (Alphabet Soup) by emmettcito (on 21. March 2021, 00:30) | 35 | 98 % |
| Anti-King Killer by Jeet Sampat (on 18. November 2021, 05:00) | 19 | 93 % |
| Schrödinger's Cat's Revenge (killer, little killer) by Chilly (on 13. December 2021, 12:31) | 20 | 90 % |
| Murder Mystery [Cipher, Little Killer, Look-and-Say Little Killer] by 3good5you (on 13. September 2023, 10:39) | 48 | 96 % |
| Nemesis by igniteice (on 3. January 2024, 15:54) | 47 | 92 % |
| ⊕ Deconstructed-RSL-Loop ⊕ by ElChiglia (on 20. April 2024, 07:15) | 47 | 92 % |
| Stolen Numerals XV*V by NurglesGift (on 9. August 2024, 20:17) | 76 | 91 % |
| Archer's Heart by SudokuExplorer (on 5. October 2021, 00:00) | 48 | 98 % |
| X---V*5 by NurglesGift (on 25. April 2025, 06:00) | 57 | 96 % |
| Krypto-Kakuro-Koralle für pin7guin by ibag (on 6. September 2013, 00:00) | 62 | 99 % |
| Spiral Fillodoku (Spiral Galaxy, Fillomino, Killer sudoku hybrid) by AnalyticalNinja (on 29. March 2023, 21:25) | 60 | 98 % |
| Renber Whispan by Sktx (on 9. July 2023, 18:29) | 34 | 95 % |
| Robot Lines by marty_sears (on 18. November 2024, 12:41) | 123 | 97 % |
| Cagey Architects (Dynamic FoW) by gdc (on 20. December 2024, 15:17) | 202 | 97 % |
| Sumsweeper by Xenonetix (on 9. May 2022, 01:33) | 49 | 96 % |
| Tapa mit Steigerung by berni (on 5. February 2009, 15:07) | 178 | 95 % |
| Rundweg mit gespaltener Persönlichkeit by Calavera (on 1. July 2009, 16:23) | 87 | 99 % |
| Adorable Fury by DiMono (on 5. October 2021, 17:30) | 21 | 94 % |
