(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 | |
|---|---|---|---|
 | A kyler map [BYO Killer Deconstruction] by Christounet (on 16. October 2023, 18:29) | 34 |  98 % |
| Desert Deity by DadJokes (on 1. December 2023, 19:43) | 39 | 95 % |
| Yo Dawg by lmdemasi (on 29. January 2024, 01:38) | 19 | 98 % |
| Parity Party XXIX, "Psy Ops" by glum_hippo (on 3. April 2024, 00:38) | 16 | 95 % |
| The Unity of Opposites by ViKingPrime (on 19. May 2024, 00:45) | 42 | 92 % |
| Afar by Andrewsarchus (on 28. June 2024, 08:57) | 19 | 93 % |
| Tapa / Islands / Narrow Cave Permaculture by KNT (on 3. July 2024, 02:40) | 38 | 96 % |
| Ripples by the_cogito (on 6. September 2024, 17:54) | 16 | 92 % |
| Parity Quads by NurglesGift (on 9. February 2025, 18:32) | 61 | 94 % |
| Schrödinger's Pseudoku by starwarigami (on 27. February 2025, 19:37) | 23 | 91 % |
| Frame Product Sandwich by RockyRoer (on 1. March 2025, 20:49) | 32 | 94 % |
| did you say walkies!? by aqjhs (on 27. June 2025, 09:27) | 28 | 99 % |
| I forget what 8 was for by sanabas (on 13. September 2025, 18:12) | 37 | 100 % |
| Summon by KNT (on 28. December 2025, 14:26) | 33 | 100 % |
| Ice Walk / Lohkous Permaculture by Agent (on 8. April 2026, 09:00) | 19 | 100 % |
| Galactic Union (Killer / Spiral Galaxy / Chaos Construction) by Tacosian (on 23. December 2023, 23:26) | 99 | 99 % |
| Chaos Construction: Slingshots by Piatato (on 26. January 2025, 00:45) | 75 | 97 % |
| X-Sums killer sudoku #2 by udukos (on 10. October 2022, 21:08) | 66 | 98 % |
| Hawaii (Spiral Galaxy Sudoku) by PjotrV (on 5. February 2022, 15:04) | 60 | 97 % |
| Third Degree by Die Hard (on 13. February 2024, 11:52) | 63 | 95 % |
