(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 | |
|---|---|---|---|
 | Ice Court by .proxz14 (on 19. October 2025, 10:04) | 23 |  97 % |
| 5 Years Portal Anniversary by Richard (on 1. November 2013, 12:02) | 96 | 98 % |
| Extragalactic by zegres (on 8. January 2024, 04:49) | 87 | 98 % |
| A 38 II by tuace (on 4. September 2016, 17:27) | 61 | 99 % |
| Roller Coaster Krypto by Uhu (on 11. November 2016, 13:47) | 59 | 98 % |
| Carrousel - (Little) Killer / Sandwich Sudoku by SlowLarry (on 23. August 2020, 21:32) | 31 | 96 % |
| Broken Bow (Disjoint Arrow) by tallcat (on 2. August 2021, 21:46) | 34 | 93 % |
| Numbered Rooms Sudoku by Qodec (on 24. January 2022, 19:19) | 126 | 97 % |
| Battle With The Archers 33: Between Friends and Enemies (part 3) by Playmaker6174 (on 21. June 2022, 08:52) | 32 | 96 % |
| Rorschach (Thermo) by tallcat (on 23. June 2022, 17:06) | 68 | 95 % |
| Skyscraper Thermos by dennischen (on 28. March 2023, 19:48) | 27 | 96 % |
| Japanese Sums #3: Reef by Myxo (on 17. May 2023, 21:10) | 63 | 95 % |
| Thermodots by Rab3aron (on 13. April 2026, 14:03) | 28 | 93 % |
| Lion (Non-touching killer sudoku) by Qodec (on 18. May 2022, 11:58) | 116 | 94 % |
| Baby’s First Crust (Chaos Construction, Crust) by Chefofdeath (on 7. March 2026, 04:43) | 78 | 97 % |
| Japanische Summen - Doppelrätsel mit Primzahlen by ibag (on 27. April 2012, 11:49) | 70 | 99 % |
| So oder so: Koralle mit Doppelsternen by CHalb (on 30. July 2015, 16:24) | 42 | 97 % |
| Jealousy by mith (on 7. March 2022, 20:22) | 50 | 96 % |
| Counting Thermos by Scojo (on 17. December 2023, 21:16) | 129 | 97 % |
| Line of Sight (9x9 Chaos Construction) by ONeill (on 22. October 2022, 02:01) | 58 | 99 % |
