(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 | |
|---|---|---|---|
 | Cageless (X) Killer Sudoku by Shinya (on 13. March 2020, 17:26) | 63 |  99 % |
| The Puzzle Has Been SET by EricRathbun (on 2. July 2025, 00:00) | 61 | 97 % |
| 1000 Rooms by Qodec (on 10. May 2022, 22:37) | 45 | 94 % |
| X-in V-ang by NurglesGift (on 9. November 2025, 15:25) | 50 | 91 % |
| Horseshoes by Kaktuslav (on 29. November 2025, 08:00) | 46 | 93 % |
| Lemures by PulverizingPancake (on 2. September 2021, 20:40) | 80 | 96 % |
| Ouroboros by zetamath (on 20. April 2021, 03:14) | 67 | 97 % |
| Whisper of the killer snake by Joseph nehme (on 27. August 2021, 18:07) | 34 | 95 % |
| Wack by the_cogito (on 22. May 2022, 16:34) | 28 | 95 % |
| POKAL Buchstabenrätsel / Letter Puzzle by DocLogic (on 2. December 2022, 16:30) | 31 | 96 % |
| Hashiwokakero by Myxo (on 19. September 2023, 08:25) | 32 | 96 % |
| The Lost Woods (BotW tribute) by MSDOS (on 3. July 2024, 07:47) | 39 | 94 % |
| Wichtels Rätselsommer 2024 (1): Bahnlinienplanung im Wunderwald by wichtel (on 11. August 2024, 20:23) | 32 | 100 % |
| Ren-Bahn #1 [Renban U-Bahn] by Christounet (on 1. September 2025, 21:12) | 31 | 98 % |
| These Aren't The Circles You're Looking For by Jay Dyer (on 7. August 2024, 00:02) | 83 | 97 % |
| Hurra: Zafer ist 33! by Richard (on 30. August 2012, 00:00) | 51 | 97 % |
| Krypto-U-Bahn - knapp daneben by ibag (on 22. May 2013, 22:33) | 47 | 96 % |
| Geburtstags-Mix Sudoku by Realshaggy (on 24. August 2020, 16:26) | 50 | 96 % |
| Build Your Own Killer: Master Designer 2 by Playmaker6174 (on 18. September 2023, 00:00) | 49 | 95 % |
| Synergy by Joseph nehme (on 7. August 2021, 08:11) | 78 | 95 % |
