(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 | |
|---|---|---|---|
 | Antenna by Gene The Supreme (on 27. January 2025, 18:37) | 27 |  90 % |
| Wanna Make You Nine, Better Get In Line by ThePedallingPianist (on 27. December 2025, 14:40) | 23 | 90 % |
| Rundweg - Vertauschte Nachbarn by Calavera (on 28. June 2009, 13:47) | 73 | 94 % |
| Corner Pockets by thoughtbyte (on 6. September 2022, 21:07) | 79 | 95 % |
| Quantum Irregularities by gdc (on 29. June 2024, 19:13) | 53 | 96 % |
| Concordia (Sum dots, X-Sums, Kropki, German Whisper) by Bellsita (on 7. February 2025, 21:49) | 52 | 98 % |
| Projectile Perturbation by DadJokes (on 24. August 2022, 19:34) | 89 | 96 % |
| May XL-Month (5) - Blackout Domino by Richard (on 31. May 2013, 12:00) | 58 | 96 % |
| Bernis Geburtstags-Transporteur by uvo (on 13. June 2013, 21:15) | 26 | 99 % |
| X---Ternal by riffclown (on 13. January 2022, 00:48) | 26 | 95 % |
| Ironworks by Bremster (on 20. January 2022, 00:08) | 35 | 95 % |
| Glyphs #3 by damasosos92 (on 12. January 2023, 16:17) | 28 | 96 % |
| 10 out of 10 by burgermason (on 8. December 2024, 10:00) | 34 | 92 % |
| ← Find-the-Whisper-Loop → by ElChiglia (on 23. March 2024, 07:15) | 36 | 92 % |
| Cracked Chaos by Astr0creep (on 13. August 2024, 19:39) | 36 | 96 % |
| SPION-AGENT-KUNDSCHAFTER Buchstabenrätsel by DocLogic (on 16. March 2021, 14:14) | 38 | 98 % |
| Until Ten (10-lines, parity mirror) by the_cogito (on 20. February 2023, 15:28) | 41 | 97 % |
| U-Bahn 3 by wooferzfg (on 28. June 2025, 06:28) | 39 | 95 % |
| Which Room Were We In? by ChinStrap (on 13. January 2026, 18:56) | 39 | 93 % |
| Discontinuity? by JayForty (on 2. February 2024, 16:38) | 92 | 96 % |
