(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 | |
|---|---|---|---|
 | Criss Cross by FullDeck-Missing (on 19. July 2022, 15:04) | 57 |  93 % |
| Madrigal by Fafrd (on 1. January 2023, 17:41) | 124 | 94 % |
| cento mani e cento occhi by aqjhs (on 28. October 2024, 05:22) | 63 | 96 % |
| Killer/Little Killer Sudoku - Find x! - Part 2 by ProwlingTiger (on 16. May 2020, 20:50) | 52 | 96 % |
| Forwards & Backwards by zetamath (on 12. July 2021, 23:43) | 48 | 93 % |
| Pitter Patter by meggen033 (on 8. February 2023, 08:15) | 67 | 94 % |
| A Breath of Cold Glass by heliopolix (on 16. December 2024, 02:17) | 44 | 91 % |
| RAT RUN 16: Schrödinger's Rat by marty_sears (on 27. November 2024, 01:00) | 803 | 98 % |
| Wichtel 2015 (8): Zahlenkoralle by wichtel (on 30. May 2016, 12:50) | 35 | 98 % |
| LM 2016 - Leftover: Mauerrundweg by CHalb (on 1. July 2016, 20:16) | 35 | 93 % |
| 3etweeN by Qodec (on 17. April 2021, 17:56) | 82 | 98 % |
| BAD Values Snooker by Zombie Hunter (on 21. February 2023, 20:24) | 36 | 96 % |
| Brötchenstempel by Myxo (on 12. March 2024, 10:24) | 43 | 97 % |
| Seattle by ICHTUES (on 7. November 2021, 06:00) | 73 | 98 % |
| MiniClues by Mesmer (on 13. August 2020, 01:36) | 35 | 94 % |
| B-2 spirits by Joseph nehme (on 22. May 2021, 11:02) | 38 | 95 % |
| Worm on a Stick by ThePedallingPianist (on 20. December 2022, 01:17) | 81 | 92 % |
| Wrogn Quasd by Sumanta(ANU) (on 20. August 2023, 13:18) | 33 | 90 % |
| Crossbow Training by Sniglett (on 29. December 2024, 02:18) | 32 | 94 % |
| Irregular Killer Sudoku 3 by Azure (on 12. April 2025, 09:28) | 40 | 95 % |
