(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 | |
|---|---|---|---|
 | Cross-blunder by chameleon (on 29. June 2023, 23:24) | 11 |  95 % |
| Knight's Kropki by Scruffamudda (on 12. August 2023, 06:13) | 29 | 99 % |
| Shivirrwisches (Shivers/Irrwisch) by dumediat (on 14. August 2023, 13:50) | 16 | 100 % |
| Build Your Own Sloopshot by mnasti2 (on 5. September 2023, 17:41) | 25 | 96 % |
| Anomaly by Migu (on 12. April 2024, 22:47) | 21 | 93 % |
| Somedokus Are Friendly Dokus by juggler (on 15. April 2024, 20:39) | 49 | 96 % |
| Parity Lines Sandwich by RockyRoer (on 29. April 2024, 03:41) | 17 | 92 % |
| High-Rise Whisper Loop by yttrio (on 15. June 2024, 02:24) | 24 | 95 % |
| Duplicitous Dots by MSDOS (on 9. August 2024, 20:06) | 13 | 91 % |
| Activate Your Renbans! by RockyRoer (on 2. November 2024, 15:44) | 18 | 93 % |
| The short akari canal by damasosos92 (on 24. February 2025, 18:43) | 14 | 98 % |
| Dama's Warning by Donatello_86 (on 19. May 2025, 04:48) | 11 | 100 % |
| Loop in Tension by Oddlyeven (on 21. July 2025, 16:39) | 25 | 91 % |
| Reachin' some region sums by twototenth (on 6. September 2022, 08:00) | 74 | 97 % |
| No Pun In Ten Did (Anti-Knight, Region Sum Line) by juddimal (on 18. July 2025, 06:40) | 88 | 96 % |
| Half the Digits (Killer) by Cane_Puzzles (on 24. May 2024, 18:06) | 185 | 97 % |
| Retraces by arbitrary (on 6. September 2024, 00:07) | 63 | 96 % |
| My Zipper is Broken by marty_sears (on 26. February 2024, 14:53) | 124 | 98 % |
| Islands by SamuPiano (on 7. December 2021, 04:52) | 50 | 98 % |
| Narwhal by Xenonetix (on 29. June 2022, 22:22) | 55 | 98 % |
