(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 | |
|---|---|---|---|
 | Kropki Nurimisaki by tallcat (on 1. February 2023, 08:00) | 74 |  94 % |
| Medieval Upheaval 3 by Nordy (on 22. January 2024, 08:30) | 88 | 99 % |
| Killer Stern by tuace (on 6. February 2014, 19:30) | 48 | 98 % |
| SLICY of Life by BenceJoful (on 2. December 2020, 00:48) | 35 | 100 % |
| Sandwich Sudoku - Club Sandwich by DiMono (on 31. December 2020, 15:20) | 19 | 96 % |
| Shooting Fish in a Cage by Strosahl (on 1. June 2021, 07:44) | 19 | 95 % |
| Rhombus Permutation by Tyrgannus (on 7. June 2021, 20:02) | 20 | 94 % |
| Cage² by GarlicBredFries (on 10. September 2021, 06:39) | 15 | 96 % |
| Portrait of a Little Killer by Strosahl (on 17. September 2021, 06:43) | 16 | 95 % |
| Antiknight Cross by Raumplaner (on 18. December 2021, 16:08) | 38 | 94 % |
| Petits Fours by fjam (on 10. January 2022, 16:41) | 18 | 91 % |
| It's a Set Up! by riffclown (on 30. June 2022, 19:22) | 41 | 96 % |
| Between the Lines (Entropic Lines/Between Lines/Kropki Pairs) by dumediat (on 28. August 2022, 17:43) | 21 | 93 % |
| Friendly Ropes (11x11 Deconstruction) by purpl (on 31. August 2022, 17:51) | 33 | 96 % |
| Phoenix by ICHTUES (on 25. September 2022, 06:00) | 135 | 96 % |
| Vice Versa by ICHTUES (on 20. November 2022, 06:00) | 18 | 98 % |
| Fillomino Romance (Chaos Construction) by Agent (on 13. December 2022, 09:00) | 69 | 100 % |
| Turkish Art: Painting Arrows (CTC Secret Santa 2022) by Niverio (on 27. December 2022, 02:29) | 34 | 99 % |
| Intersection by ralphwaldo1 (on 3. January 2023, 02:44) | 17 | 96 % |
| Mafia (Chaos Construction) by Agent (on 7. November 2023, 09:00) | 136 | 98 % |
