(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 | |
|---|---|---|---|
 | Dumbbells by djorr (on 29. March 2022, 14:00) | 24 |  97 % |
| Pieces of the Puzzle by grkles (on 22. February 2022, 01:39) | 21 | 99 % |
| Unlucky Killers by bodemeister (on 9. May 2023, 03:02) | 20 | 94 % |
| Target Acquired by Scojo (on 28. January 2024, 22:54) | 21 | 94 % |
| Loopy Parity X-Sums by yttrio (on 20. July 2024, 02:56) | 43 | 98 % |
| A Pair of Ragged Claws by cygne (on 11. January 2026, 07:50) | 24 | 93 % |
| Radical Region Sum Loop by yttrio (on 17. November 2023, 21:25) | 69 | 96 % |
| Medley by Playmaker6174 (on 2. September 2024, 08:00) | 71 | 94 % |
| 3D Chaos by mathpesto (on 11. April 2022, 00:20) | 43 | 97 % |
| Cross The Streams by Uhu (on 3. August 2024, 21:19) | 43 | 96 % |
| Seven Days by Sartor (on 6. March 2026, 22:50) | 41 | 97 % |
| Pünktchen Sudoku 4 by Richard (on 6. June 2009, 23:46) | 148 | 90 % |
| Ameisenstrasse by Luigi (on 6. May 2011, 12:16) | 22 | 92 % |
| Cube by DVFrank (on 23. June 2021, 18:34) | 42 | 97 % |
| Turning Point by XeonRisq (on 5. October 2022, 04:00) | 27 | 92 % |
| Where's my sandwich? (Sandwich, Numbered Rooms, Kropki) by Chilly (on 19. June 2023, 17:36) | 24 | 92 % |
| Trisection by Andrewsarchus (on 16. July 2024, 06:27) | 24 | 93 % |
| The Voice of the Masked Idol who has Got Talent by Morisenseiisgod (on 2. September 2024, 14:01) | 28 | 91 % |
| Mobile Skyscrapers by juddimal (on 22. March 2025, 17:05) | 24 | 95 % |
| What are the sums? by Benji1810 (on 26. March 2025, 20:50) | 26 | 92 % |
