(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 | |
|---|---|---|---|
 | Rhizome (Fillomino/Landvermessung/Irrwisch) by dumediat (on 13. September 2023, 13:06) | 16 |  96 % |
| Whispering Tapa-logy by yttrio (on 19. January 2024, 22:10) | 32 | 97 % |
| Pointing parodies by someguy209 (on 21. September 2024, 04:35) | 38 | 92 % |
| The Moving Finger (Numbered Regions Chaos Construction) by tallcat (on 27. February 2025, 03:00) | 34 | 93 % |
| 4-color killer sudoku #2 by Nylimb (on 3. April 2021, 04:45) | 47 | 100 % |
| Japanische Höhle vom Hein mit Hilfe vom Irrwisch (2) by ibag (on 20. April 2020, 00:00) | 29 | 100 % |
| Killers and Palindromes by tenaliraman (on 3. January 2021, 06:45) | 37 | 98 % |
| Y Are We Whispering? by glum_hippo (on 18. September 2021, 04:12) | 33 | 94 % |
| The Devil's Cage by TinkerTroy (on 3. October 2022, 18:36) | 33 | 96 % |
| Killocator by starwarigami (on 27. October 2021, 10:15) | 54 | 98 % |
| Arrow Logic by PotatoHead21 (on 17. May 2021, 21:03) | 17 | 94 % |
| All Directions by Joseph nehme (on 19. February 2022, 07:48) | 30 | 97 % |
| Wichtel 2021 (2): Der Sternenkompass by wichtel (on 1. June 2022, 21:20) | 14 | 100 % |
| Japanese Sums Cave Cipher: Nonogram Cave-ception by Xendari (on 8. January 2023, 13:59) | 29 | 99 % |
| Dubai by Jay Dyer (on 7. March 2023, 22:49) | 34 | 93 % |
| Who Stole the X's and V's?! by LittleNightmaresLady (on 22. April 2023, 18:05) | 32 | 93 % |
| Arrow Jungle by PotatoHead21 (on 18. August 2023, 11:49) | 18 | 92 % |
| What's in a naname? (Nanameguri/Killer) by dumediat (on 7. September 2023, 22:51) | 15 | 98 % |
| On The Bottom Shelf (Nabner Modifier Sudoku) by Silverstep (on 9. September 2023, 00:24) | 13 | 94 % |
| Blue Lightning by LittleNightmaresLady (on 25. September 2023, 18:14) | 17 | 90 % |
