(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 | |
|---|---|---|---|
 | Assembly by juggler (on 7. December 2025, 08:41) | 120 |  98 % |
| Red Lodge, Montana (Sudoku-Creek Hybrid) by mathpesto (on 24. December 2023, 17:10) | 121 | 97 % |
| Inner Square Diagonals by Phistomefel (on 12. August 2024, 13:31) | 95 | 97 % |
| Full Rank Sandwich by RockyRoer (on 5. June 2022, 03:22) | 59 | 100 % |
| Cave Akari by Mark Sweep (on 4. December 2020, 10:00) | 58 | 99 % |
| DIY Arrows by sophmayrob (on 15. June 2023, 07:59) | 54 | 98 % |
| Glyphs #5 by damasosos92 (on 23. February 2023, 23:55) | 52 | 97 % |
| How Bizarre by Nahileon (on 5. June 2024, 14:42) | 45 | 96 % |
| Above Thy Neighbour by marty_sears (on 20. June 2023, 19:20) | 57 | 91 % |
| Chalice (Anti-knight, Thermo) by emmettcito (on 23. April 2021, 19:21) | 48 | 93 % |
| Nineteen by FryTheGuy (on 29. November 2021, 16:51) | 41 | 94 % |
| Ballast by wooferzfg (on 29. July 2023, 23:07) | 36 | 97 % |
| Whispering Tapa-logy by yttrio (on 19. January 2024, 22:10) | 36 | 97 % |
| Leftovers by ThePedallingPianist (on 16. October 2025, 03:10) | 40 | 95 % |
| Magnetplatten-Tausch-ABCtje (2) by ibag (on 27. March 2013, 00:00) | 32 | 98 % |
| Galaxy Lunchboxes by Undar_Beyond (on 21. June 2020, 13:57) | 40 | 97 % |
| SC24 - Region Sum Lines 2 by kuraban (on 22. November 2022, 19:33) | 37 | 93 % |
| Millstone by jwsinclair (on 13. June 2024, 20:59) | 77 | 98 % |
| Building Blocks by grkles (on 2. February 2022, 04:00) | 34 | 97 % |
| All Directions by Joseph nehme (on 19. February 2022, 07:48) | 33 | 97 % |
