(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 | |
|---|---|---|---|
 | Balanceo by ralphwaldo1 (on 8. April 2024, 22:48) | 17 |  90 % |
| What is the sum? by Benji1810 (on 23. February 2025, 19:13) | 34 | 92 % |
| A Bit of 12-Line Fun by ebiggie (on 20. July 2025, 13:42) | 36 | 95 % |
| Dutch Angles by ndsurgenor (on 30. March 2025, 12:04) | 16 | 90 % |
| Every Pea, Every Screw (with sujoyku) by SamuPiano (on 30. May 2025, 15:44) | 47 | 97 % |
| Defiance by Maximus (on 2. August 2025, 08:44) | 18 | 94 % |
| Taste the Tension by GameWorksRP (on 27. October 2025, 11:54) | 54 | 93 % |
| jolly green giant, his arms folded by mellowrobinson (on 11. November 2025, 03:21) | 32 | 99 % |
| Mushy Peas by Oddlyeven (on 14. November 2025, 23:02) | 15 | 90 % |
| Säntis (collab with ICHTUES) by Florian Wortmann (on 25. October 2023, 20:05) | 127 | 96 % |
| Popcorn by PulverizingPancake (on 6. February 2023, 17:16) | 57 | 92 % |
| Diamonds And Butterflies by Niverio (on 15. July 2023, 17:58) | 56 | 95 % |
| Little Killer Sudoku #2 by Phistomefel (on 25. March 2020, 15:42) | 103 | 96 % |
| Reversi by Wuschel (on 5. November 2023, 21:18) | 77 | 96 % |
| Japanische Summen gerade - ungerade by ibag (on 1. August 2012, 22:10) | 84 | 99 % |
| Sudoku Variants Series (284) - Isolation Killer Sudoku by Richard (on 2. September 2020, 00:00) | 100 | 96 % |
| Whirlygig (Renban Whisper) by tallcat (on 15. April 2022, 16:59) | 102 | 97 % |
| 2many arrows spoil the box by tesseralis (on 27. August 2022, 07:31) | 101 | 96 % |
| U-Bahn unter Hochhäusern (Teil 9) by Zzzyxas (on 5. May 2012, 18:21) | 55 | 98 % |
| The Dirty Dozen by twototenth (on 28. June 2022, 08:00) | 55 | 97 % |
