(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 | |
|---|---|---|---|
 | German Whisper Cages by kolot (on 17. March 2022, 19:50) | 68 |  98 % |
| Chaos Construction: Thermos by XeonRisq (on 8. May 2022, 01:00) | 20 | 98 % |
| Grid Dancing by Bremster (on 4. June 2022, 05:52) | 57 | 98 % |
| Bharatanatyam (2T1L CC) by Xenonetix (on 13. August 2022, 00:22) | 39 | 97 % |
| X-Sums / Skyscraper Killer Sudoku by KNT (on 16. September 2022, 18:17) | 58 | 98 % |
| Trident by randall (on 6. January 2023, 23:46) | 18 | 95 % |
| Missing Digits by FryTheGuy (on 15. January 2023, 21:01) | 27 | 94 % |
| Crypto Japanese Cave / Pentominous by KNT (on 26. January 2023, 04:41) | 40 | 99 % |
| Loop Nurikabe by wooferzfg (on 2. February 2023, 16:31) | 117 | 98 % |
| Boxes of Paint (Colourful Killers) by The Book Wyrm (on 23. November 2023, 23:18) | 13 | 91 % |
| I.M.A.P.P: Wild Japanese Sum Tapa (12x12) by Playmaker6174 (on 29. January 2024, 22:31) | 23 | 98 % |
| Bank Vault by mormagli (on 5. June 2024, 19:45) | 20 | 95 % |
| Factorial Cages by Nurator (on 13. August 2024, 10:48) | 13 | 90 % |
| Old Maid by ICHTUES (on 5. February 2025, 23:34) | 66 | 98 % |
| Chaconopia: Intro 9x9 (Chaos Construction) by Mad-Tyas (on 12. August 2025, 13:54) | 25 | 100 % |
| Whispering Killers by Yawnus (on 28. August 2025, 18:12) | 13 | 90 % |
| Zodiac Project: the year of the dög by aqjhs (on 20. November 2025, 00:55) | 36 | 98 % |
| U-Bahn Aqre (ft. Christounet) by cyddrdrd (on 17. January 2026, 00:00) | 16 | 100 % |
| These Go to Fifteen by ViKingPrime (on 24. January 2026, 05:00) | 27 | 96 % |
| Even Smaller Territories by masetab (on 8. April 2026, 09:26) | 51 | 93 % |
