(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 | |
|---|---|---|---|
 | Loop Aquarium by wooferzfg (on 23. October 2022, 20:25) | 47 |  96 % |
| Bushido (Star Battle Japanese Sums Fillomino) by Agent (on 6. December 2022, 09:00) | 49 | 99 % |
| Above Thy Neighbour by marty_sears (on 20. June 2023, 19:20) | 64 | 92 % |
| Fifth Wheel by IcyFruit (on 27. February 2025, 14:27) | 100 | 99 % |
| Jet Lag (Renban Killer Sudoku) by Agent (on 29. April 2022, 09:00) | 31 | 96 % |
| Dubai by Jay Dyer (on 7. March 2023, 22:49) | 36 | 94 % |
| Counting Dimensions by Fenners (on 5. July 2025, 07:08) | 41 | 92 % |
| Partial Manhattan Sudoku by Madmahogany (on 29. April 2020, 14:20) | 46 | 94 % |
| Killoc4tor: Kill List by starwarigami (on 14. November 2021, 03:07) | 29 | 99 % |
| Arrows Anonymous by XeonRisq (on 11. March 2022, 04:00) | 13 | 98 % |
| Pawn's SET Piece (6x6) by mormagli (on 23. October 2022, 02:48) | 17 | 98 % |
| Venomous Snakes by lepton (on 2. February 2023, 16:27) | 41 | 99 % |
| Lighthouse Nurikabe by Gliperal (on 8. February 2023, 20:57) | 15 | 94 % |
| Renber Whispan by Sktx (on 9. July 2023, 18:29) | 35 | 92 % |
| What's in a naname? (Nanameguri/Killer) by dumediat (on 7. September 2023, 22:51) | 16 | 98 % |
| Photonic Crystal Wings by heliopolix (on 14. October 2023, 02:47) | 20 | 100 % |
| Cosmic Cages by yanggang (on 24. July 2024, 23:20) | 32 | 92 % |
| Arrow Dynamics by PotatoHead21 (on 23. September 2024, 21:35) | 19 | 98 % |
| Cagey Architects (Dynamic FoW) by gdc (on 20. December 2024, 15:17) | 227 | 97 % |
| Life, Uh, Finds a Way by juggler (on 9. September 2025, 00:03) | 53 | 96 % |
