(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 | |
|---|---|---|---|
 | Crypto Japanese Halligen for Gliperal by KNT (on 4. June 2023, 06:51) | 24 |  93 % |
| Bletchley Park by fjam (on 11. June 2023, 20:40) | 19 | 100 % |
| U-Bahn with Empty Clues (4) by KNT (on 28. July 2023, 15:50) | 43 | 97 % |
| Roller Coaster mit Myxo by KNT (on 18. September 2023, 23:43) | 20 | 97 % |
| Missing Nine by FryTheGuy (on 4. September 2023, 01:40) | 15 | 95 % |
| What by zzw (on 21. September 2023, 04:17) | 58 | 91 % |
| Japanese Sums #3: Combination by lerroyy (on 3. November 2023, 12:57) | 15 | 95 % |
| Deconstruct Your Sandwiches by Tacosian (on 3. December 2023, 00:24) | 24 | 95 % |
| Rock, Paper, Scissors by IcyFruit (on 4. January 2024, 16:33) | 26 | 96 % |
| Walls of Eternal Damnation (Secret Satan) by Agent (on 22. January 2024, 09:00) | 29 | 97 % |
| Sorted Coral Subway by wooferzfg (on 3. August 2024, 08:23) | 13 | 100 % |
| Wichtels Rätselsommer 2024 (7): Die Sieben Brücken der Welt by wichtel (on 11. September 2024, 20:23) | 16 | 100 % |
| Pentominous U-Bahn by KNT (on 17. November 2024, 02:15) | 43 | 97 % |
| Full Folding Frenzy by ThePedallingPianist (on 22. December 2024, 00:40) | 20 | 91 % |
| The Evil Ennead by heliopolix (on 4. February 2025, 21:53) | 13 | 100 % |
| Chaos Construction: Surround Sums by PixelPlucker (on 17. March 2025, 22:45) | 26 | 96 % |
| 4 Stones, 1 Bird (Lost and Found #8 - Finale) by .proxz14 (on 25. May 2025, 09:58) | 19 | 91 % |
| The Devilish Double-Tripleblock by Las4one (on 24. June 2025, 11:08) | 12 | 100 % |
| Stationary Loop Deconstruction (1-9) by Playmaker6174 (on 20. July 2025, 22:00) | 30 | 99 % |
| Pandemonium by Andrewsarchus (on 23. July 2025, 13:45) | 20 | 97 % |
