(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 | |
|---|---|---|---|
 | Zoom by matt383 (on 22. March 2023, 13:49) | 80 |  95 % |
| X Marks The Spot by Djmelee3000 (on 11. September 2020, 08:51) | 48 | 97 % |
| Smus-X by Qodec (on 25. September 2022, 14:44) | 66 | 96 % |
| Wichtelkalender 2014 - Dezember: Der Weg des Weihnachtsmannes by Statistica (on 1. December 2014, 00:12) | 75 | 99 % |
| Six Pathway-Linked Puzzles by Genomico (on 22. September 2020, 15:36) | 36 | 97 % |
| V's by ICHTUES (on 23. May 2021, 06:00) | 21 | 93 % |
| Amnesia by Dave252 (on 3. August 2021, 16:37) | 19 | 98 % |
| You've Got Mail! by starwarigami (on 29. September 2021, 00:40) | 21 | 90 % |
| NNN by mith (on 28. March 2022, 23:09) | 42 | 96 % |
| Zig by grkles (on 29. May 2022, 20:40) | 50 | 96 % |
| (1)59.(4) by twototenth (on 31. May 2022, 08:00) | 35 | 96 % |
| Companions by Joseph nehme (on 3. November 2022, 09:46) | 20 | 92 % |
| A-Sums X Sandwich by ICHTUES (on 29. January 2023, 06:00) | 58 | 96 % |
| Whispers of Entropy 2: Balance by Mad-Tyas (on 6. March 2023, 09:01) | 37 | 97 % |
| Escape the Programmer's Vortex by Oddlyeven (on 31. March 2023, 02:45) | 18 | 93 % |
| U-Bahn with Cages by wooferzfg (on 26. April 2023, 23:39) | 37 | 95 % |
| Vlad the Impaler - Parity mirror, killer sudoku by Mr.Menace (on 19. August 2023, 08:14) | 42 | 94 % |
| N-lines by Lizzy01 (on 19. February 2024, 11:19) | 19 | 95 % |
| The Reorg by Andrewsarchus (on 19. December 2025, 12:40) | 17 | 100 % |
| Grid Ground Grode by MathGuy_12 (on 4. February 2026, 03:12) | 15 | 92 % |
