(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 | |
|---|---|---|---|
 | Schach - Lügendetektor Logical by DocLogic (on 30. April 2020, 22:24) | 21 |  93 % |
| HeatTen Up by djorr (on 20. February 2023, 14:00) | 27 | 92 % |
| Belegtes Brot by ICHTUES (on 5. February 2023, 06:00) | 22 | 92 % |
| Lowrider by Wuschel (on 20. March 2024, 08:46) | 52 | 92 % |
| If At All Possible by Big Tiger (on 11. April 2024, 21:11) | 24 | 95 % |
| Golden Cages by Prof.Dori (on 4. May 2024, 21:12) | 31 | 91 % |
| One Too Many (Japanese Sums, Tiny Cave) by .proxz14 (on 2. March 2025, 14:43) | 21 | 95 % |
| Pacify 2: Surrounded by SamuPiano (on 6. May 2025, 15:44) | 25 | 95 % |
| Tebak (Squishdoku + Killer Cage) by Krisonium (on 23. January 2026, 05:53) | 26 | 94 % |
| Latent Entanglement by 99%Sneaky (on 14. February 2025, 18:15) | 83 | 95 % |
| Krypto-X-Summen mit Zerrspiegeln by ibag (on 26. June 2019, 00:00) | 51 | 98 % |
| Pierced by Joseph nehme (on 23. July 2022, 09:01) | 60 | 91 % |
| Golden Palindromes by MathGuy_12 (on 23. September 2025, 03:28) | 126 | 97 % |
| Treppen (4) by BFaw (on 28. August 2012, 09:00) | 26 | 94 % |
| U-Bahn mit gemischten Hinweisen (Teil 1) by Zzzyxas (on 28. December 2019, 13:32) | 51 | 99 % |
| Path with opposite crosses (novel puzzle type) by SebastianSimon (on 23. December 2020, 14:58) | 25 | 96 % |
| Galaga by tenaliraman (on 16. September 2022, 10:35) | 58 | 95 % |
| Entropy miracle 6 by fractalminding (on 27. February 2026, 16:11) | 37 | 90 % |
| Colorful Intersection by Rab3aron (on 22. March 2026, 12:49) | 86 | 97 % |
| Thermo Sudoku by Realshaggy (on 26. May 2020, 22:31) | 92 | 94 % |
