(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 | |
|---|---|---|---|
 | Balanceo by ralphwaldo1 (on 8. April 2024, 22:48) | 18 |  91 % |
| Augur's gift (Japanese sums/Mean mini/Kropki) by dumediat (on 24. May 2024, 03:09) | 34 | 97 % |
| The Curse of King Minos by Allagem (on 17. November 2024, 07:06) | 139 | 97 % |
| X*Cage by NurglesGift (on 27. November 2024, 18:14) | 144 | 94 % |
| Position Sums Thermo Sudoku by clover (on 26. January 2025, 12:53) | 27 | 93 % |
| CTC U-Bahn Guest Series Extras: Extra Region U-Bahn by KNT (on 19. May 2025, 11:54) | 44 | 97 % |
| Angel by zetamath (on 8. August 2025, 19:50) | 98 | 96 % |
| Mushy Peas by Oddlyeven (on 14. November 2025, 23:02) | 16 | 91 % |
| Modder on the Dancefloor by Sotehr (on 15. November 2025, 01:00) | 16 | 91 % |
| Doppel Arrows by Scojo (on 6. December 2025, 08:09) | 30 | 93 % |
| (Yin)German Pairrows by SennyK (on 6. January 2026, 20:10) | 35 | 92 % |
| Stolen Numerals XVII by NurglesGift (on 15. July 2024, 16:24) | 125 | 97 % |
| Embark (Fog of war/Deconstruction/Killer/Yajilin) by dumediat (on 21. January 2023, 13:50) | 159 | 97 % |
| Point the Silent Path by Niverio (on 18. June 2024, 09:25) | 65 | 97 % |
| Do I Sing Her End? by juddimal (on 8. July 2024, 22:54) | 75 | 95 % |
| Canadian Whispers by Mojo872 (on 15. December 2021, 07:13) | 57 | 96 % |
| Steamed Hams by Perladel (on 12. October 2022, 13:03) | 69 | 96 % |
| Extreme Three Color Fun by ebiggie (on 30. May 2025, 00:11) | 83 | 92 % |
| Six 6x6-sudoku pack by Qodec (on 26. June 2021, 23:10) | 51 | 98 % |
| Ghost Cages by juggler (on 19. July 2024, 03:38) | 101 | 94 % |
