(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 | |
|---|---|---|---|
 | Taco Bowl 3 - Ring Of Fire by DiMono (on 19. March 2021, 16:15) | 39 |  100 % |
| Misfits by filuta (on 10. November 2022, 17:30) | 35 | 99 % |
| Fillomino Chaos Construction #2 by dennischen (on 7. June 2023, 18:15) | 42 | 97 % |
| Roller Coaster mit Extras 16 by Uhu (on 5. March 2020, 07:34) | 28 | 99 % |
| Loses Kalenderblatt April 2020 by April (on 1. April 2020, 00:00) | 17 | 100 % |
| Junction by grkles (on 22. May 2021, 03:53) | 25 | 99 % |
| Watermill by lerroyy (on 15. May 2022, 22:44) | 29 | 97 % |
| Nary A'Dot by mormagli (on 2. February 2023, 22:42) | 27 | 94 % |
| Star-Crossed Sandwiches by DarthParadox (on 25. January 2024, 01:26) | 27 | 92 % |
| Hysteria (Chaos Construction) by ThePedallingPianist (on 14. April 2024, 04:56) | 45 | 97 % |
| Knapp daneben Twin Killer II by Richard (on 1. January 2010, 12:00) | 36 | 94 % |
| Chaos is a Club Sandwich (9X9) by SenatorGronk (on 19. February 2022, 23:49) | 35 | 98 % |
| Watchtower sudoku by Lizzy01 (on 1. August 2022, 10:24) | 19 | 95 % |
| Killocator: Dead or Alive by starwarigami (on 28. February 2024, 10:17) | 18 | 95 % |
| Sadism by grkles (on 17. October 2022, 13:05) | 57 | 97 % |
| Crypto Japanese Cave (Fillomino) by KNT (on 5. November 2022, 16:24) | 41 | 100 % |
| Chaos Construction: Border Sums by KNT (on 24. April 2022, 22:24) | 51 | 99 % |
| 1-N Chaos Deconstruction: Whisper / Renban / Between by KNT (on 14. May 2022, 16:49) | 52 | 97 % |
| Subway To Hell by Piatato (on 27. January 2024, 15:45) | 23 | 100 % |
| LM 2017 Reste: Achterbahn (ohne Sicherheitsgurte) by pwahs (on 14. April 2017, 10:00) | 34 | 99 % |
