(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 | |
|---|---|---|---|
 | Roller Coaster mit Extras 6 by Uhu (on 11. April 2018, 22:43) | 61 |  99 % |
| Sacred Crypt by Allagem (on 6. May 2023, 08:15) | 67 | 95 % |
| Loop With A Difference by Scruffamudda (on 5. May 2023, 00:09) | 51 | 96 % |
| Froschteich by Myxo (on 25. August 2024, 15:01) | 50 | 94 % |
| Quantum Chaos (CC, S-Cells) by gdc (on 31. August 2024, 00:26) | 58 | 95 % |
| 15x15 Standard Pentominous by stefliew (on 28. March 2021, 08:46) | 39 | 99 % |
| Antiking Kaleidoscope (Stitched Rainbow VI) by thoughtbyte (on 7. August 2022, 03:16) | 40 | 97 % |
| Archer's Tale: The Roundtable by Playmaker6174 (on 7. October 2022, 11:26) | 37 | 97 % |
| Intertwined by siron2133 (on 29. October 2022, 11:34) | 37 | 91 % |
| Pigeonhole [Renban, Kropki] by Miky (on 26. March 2023, 10:21) | 73 | 91 % |
| Neon Neko by Senip (on 16. July 2023, 17:58) | 40 | 93 % |
| Adventskalender 2025, Türchen 7 - Adventskerzen by Zzzyxas (on 7. December 2025, 07:00) | 42 | 96 % |
| U-Bahn unter Hochhäusern (Teil 7) by Zzzyxas (on 5. May 2012, 18:21) | 54 | 99 % |
| Chaos Control by Scojo (on 15. April 2023, 01:59) | 60 | 94 % |
| Odd / Even Killer Sudoku (#1) by Mr.Menace (on 30. October 2020, 21:11) | 25 | 91 % |
| Little Killer by abed hawila (on 18. January 2021, 12:55) | 22 | 94 % |
| Sandwich Thermo Arrow Sudoku by Lizzy01 (on 9. May 2021, 20:17) | 24 | 90 % |
| Tic Tac Logic Sudoku by panthchesh (on 12. December 2021, 14:10) | 26 | 94 % |
| Battle With The Archers 36 - Dual Puzzles: Directional Intuition by Playmaker6174 (on 24. September 2022, 11:27) | 21 | 94 % |
| HeatTen Up by djorr (on 20. February 2023, 14:00) | 26 | 92 % |
