(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 | |
|---|---|---|---|
 | Close Friends by mathpesto (on 2. December 2021, 21:43) | 32 |  95 % |
| Black Jack by Andrewsarchus (on 5. December 2021, 07:02) | 19 | 97 % |
| Schrödinger's Dots by starwarigami (on 18. December 2021, 02:34) | 54 | 99 % |
| Oreo by the_cogito (on 16. January 2022, 18:07) | 13 | 96 % |
| Tightly Packed by Cane_Puzzles (on 3. February 2022, 12:01) | 91 | 96 % |
| 2-knight by fritzdis (on 21. March 2022, 20:40) | 51 | 91 % |
| Stretch marks by Qodec (on 23. March 2022, 21:37) | 102 | 98 % |
| Who Likes Knights? by Yawnus (on 30. June 2022, 10:12) | 18 | 96 % |
| Cartesian 159 by noswald (on 19. August 2022, 07:09) | 16 | 91 % |
| Dobbledoku by krtekcze (on 27. April 2023, 14:10) | 30 | 93 % |
| Poshley Heights by wooferzfg (on 17. May 2023, 06:04) | 34 | 99 % |
| No Odd Cages (Parity line / killer sudoku) by Mr.Menace (on 11. June 2023, 09:01) | 44 | 97 % |
| Rivets by XeonRisq (on 12. June 2023, 04:00) | 70 | 96 % |
| [159] Tilted by W1DEMAN (on 27. September 2023, 06:45) | 32 | 92 % |
| Jellyfish Jam [Anti-King Akari RGB] by wisty (on 26. October 2023, 02:46) | 14 | 100 % |
| Meidjuizy by Lizzy01 (on 14. November 2023, 11:36) | 41 | 100 % |
| Fours & Fives by Scruffamudda (on 27. November 2023, 02:24) | 14 | 92 % |
| Roller Coaster by igniteice (on 29. November 2023, 05:58) | 27 | 92 % |
| Two Trips by igniteice (on 1. January 2024, 00:48) | 57 | 96 % |
| Knights in Cages by Bert (on 29. January 2024, 16:41) | 50 | 96 % |
