(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 | |
|---|---|---|---|
 | Fireworks and Firecrackers by Emphyrio (on 20. March 2022, 01:15) | 19 |  97 % |
| The Amazing World of Grkles by Playmaker6174 (on 31. October 2022, 03:10) | 30 | 95 % |
| SneX by JayForty (on 17. March 2023, 20:28) | 17 | 90 % |
| Cave Battle (15x15) by Jesper (on 20. March 2023, 16:00) | 40 | 99 % |
| Arrow Spine Indexing by Die Hard (on 20. March 2023, 11:58) | 16 | 96 % |
| I Fell Down The Waterfall by LittleNightmaresLady (on 6. May 2023, 18:04) | 22 | 92 % |
| Trash Arrow Sudoku by LittleNightmaresLady (on 18. June 2023, 20:17) | 23 | 93 % |
| Excavation (arrows) by ZeroUltra (on 10. August 2023, 21:15) | 16 | 92 % |
| Schrödinger 201: Reversing Time's Arrow by ViKingPrime (on 20. September 2023, 01:00) | 33 | 94 % |
| Doppler Effect by Knickolas (on 1. February 2024, 00:14) | 43 | 96 % |
| Schrödinger's Knights by lepton (on 9. March 2024, 11:50) | 14 | 92 % |
| Pinch Hitter by ViKingPrime (on 14. May 2024, 03:00) | 27 | 90 % |
| Pathfinder by vitaminz (on 10. June 2024, 20:50) | 14 | 98 % |
| Mellow Mancala by heliopolix (on 13. July 2024, 00:00) | 14 | 92 % |
| Rank Up 06 - Fibonacci Squishtroquadri by ThePedallingPianist (on 14. July 2024, 01:08) | 26 | 96 % |
| Underground Traffic (U-Bahn tetromino) by Samish (on 10. October 2024, 12:09) | 18 | 99 % |
| Killer Sandwich by Phistomefel (on 6. February 2020, 22:14) | 94 | 95 % |
| Windmill by lerroyy (on 13. March 2022, 20:11) | 72 | 99 % |
| Roller Coaster mit Extras 12 by Uhu (on 9. March 2019, 22:13) | 40 | 96 % |
| Dancing Arrows (Arrow Sudoku) by FryTheGuy (on 15. June 2021, 07:42) | 43 | 92 % |
