(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 | |
|---|---|---|---|
 | Division Cell by billybobo445 (on 12. May 2023, 04:48) | 49 |  98 % |
| Instructionless by dennischen (on 29. July 2023, 04:44) | 24 | 94 % |
| To The Nines by arbitrary (on 9. October 2023, 23:05) | 12 | 93 % |
| Dragon Ball / ドラゴンボール / 龍珠 by MonsieurTRISTE (on 10. January 2025, 09:23) | 23 | 95 % |
| Whispering Isles by yttrio (on 18. January 2025, 01:44) | 66 | 97 % |
| Dutch Flat Mates (Chaos Construction Shifter) - Palpot Collab by Flinty (on 16. October 2024, 11:30) | 69 | 97 % |
| Thermoconstrictor by HalfBakedLunatic (on 27. October 2023, 19:20) | 62 | 95 % |
| X*Cage by NurglesGift (on 27. November 2024, 18:14) | 119 | 94 % |
| Killer Sudoku by Greg (on 14. June 2020, 21:04) | 41 | 92 % |
| Pandora's BoXXX by twototenth (on 13. December 2022, 08:00) | 42 | 94 % |
| Mixed Doubles by marty_sears (on 28. August 2023, 18:38) | 46 | 97 % |
| The Magic Potion (Zippular Lines #2) by heliopolix (on 17. December 2023, 02:57) | 40 | 94 % |
| Switch-O-Renban by Ridhwan (on 5. May 2024, 11:06) | 38 | 95 % |
| Tauschpfad (2) by BFaw (on 27. August 2011, 13:20) | 29 | 92 % |
| CtC-Tribute-Thermo-Sudoku by olima (on 15. August 2020, 23:42) | 62 | 91 % |
| Revolution by Stavros96 (on 18. September 2021, 10:54) | 30 | 97 % |
| Portal Killer by crispy16 (on 11. June 2022, 04:29) | 28 | 96 % |
| This is it. I've done it. by EricRathbun (on 23. April 2023, 00:19) | 56 | 97 % |
| Equal Sum Arrows by Sumanta(ANU) (on 7. June 2023, 11:21) | 29 | 93 % |
| Numbers in Cages in Regions in a 6x6 by PeterJoe (on 29. September 2023, 14:58) | 29 | 97 % |
