(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 | |
|---|---|---|---|
 | Mutant Fillomino by au voleur! (on 19. February 2022, 18:03) | 27 |  95 % |
| Battle With The Archers 31: When Allies Collide by Playmaker6174 (on 29. April 2022, 22:59) | 70 | 98 % |
| CtC 500k Tribute by apiyo (on 30. August 2022, 05:56) | 14 | 91 % |
| Wichtel 2022 (3): Weihnachtsgeisterbahn by wichtel (on 13. September 2023, 10:10) | 15 | 100 % |
| Pseudogenes by ViKingPrime (on 5. February 2024, 21:00) | 11 | 98 % |
| Δ Polygon Doppelganger by KenGlue (on 14. February 2024, 21:31) | 14 | 95 % |
| Yin-Yang Renbanominos 2 by Die Hard (on 12. May 2024, 00:06) | 12 | 93 % |
| San Diego by SenatorGronk (on 21. August 2024, 02:49) | 27 | 94 % |
| Entangled Between (Entropic lines, Palindrome) by jcgodart (on 12. September 2024, 04:21) | 17 | 95 % |
| Interchangeable 2 by palpot (on 29. January 2025, 22:12) | 14 | 95 % |
| phresh out the dryer by aqjhs (on 23. April 2025, 09:51) | 31 | 94 % |
| The Weird E-key by ebiggie (on 6. August 2025, 22:07) | 15 | 93 % |
| XY-Cages III, "Glum Symmetry" by glum_hippo (on 22. October 2025, 14:45) | 14 | 98 % |
| Shuffledoku by Kaktuslav (on 31. October 2025, 08:00) | 16 | 98 % |
| split pearsonality / dopealgänger by aqjhs (on 2. November 2025, 23:53) | 44 | 98 % |
| Diamond Diadem by .proxz14 (on 1. May 2026, 17:41) | 15 | 95 % |
| Would I lie to you? by juggler (on 17. December 2024, 01:37) | 81 | 96 % |
| Little Killer Sudoku by trivial171 (on 11. May 2020, 00:46) | 55 | 95 % |
| Thermosn8kes by Nordy (on 5. August 2022, 08:00) | 56 | 95 % |
| Kurotto (Aqre) by KNT (on 3. June 2024, 15:44) | 107 | 98 % |
