(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 | |
|---|---|---|---|
 | Fogrotto by mathpesto (on 17. December 2022, 15:29) | 208 |  96 % |
| Außerirdischer und Osterhase by ibag (on 20. April 2014, 05:10) | 24 | 96 % |
| Maximal Anti-Killer Sudoku by Madmahogany (on 17. July 2020, 23:12) | 33 | 94 % |
| Lying Stars 2 (Liar Partial Killer) by Djmelee3000 (on 21. September 2020, 06:02) | 27 | 94 % |
| Baba is Two by FryTheGuy (on 25. October 2021, 07:15) | 26 | 100 % |
| XS-ive Chaos by mathpesto (on 27. February 2022, 03:10) | 53 | 98 % |
| Wichtel 2021 (1): Die Stadtviertel von Pentopia by wichtel (on 26. May 2022, 22:10) | 25 | 94 % |
| Knights & Knaves by ndsurgenor (on 23. October 2022, 12:00) | 24 | 94 % |
| Klappstuhl by ICHTUES (on 27. August 2023, 06:00) | 73 | 97 % |
| ZEITUNG - Buchstabenrätsel / Letter Puzzle by DocLogic (on 6. April 2025, 20:47) | 24 | 95 % |
| Unlikely friends (Anti-knight thermo sudoku) by Phistomefel (on 21. July 2025, 19:19) | 231 | 96 % |
| On Chin Ice by gdc (on 24. March 2026, 19:10) | 53 | 95 % |
| Anti-Knight Thermos 2 by Jeet Sampat (on 4. January 2023, 10:47) | 112 | 97 % |
| Eine Handvoll U-Bahnen (Teil 5) - Standard by Zzzyxas (on 18. February 2022, 22:50) | 50 | 99 % |
| Polar Vortex by mathpesto (on 2. October 2022, 22:42) | 52 | 91 % |
| Revolver by Myxo (on 2. February 2023, 12:08) | 79 | 92 % |
| Happy Holiday! by Richard (on 15. July 2011, 12:00) | 56 | 91 % |
| Eight Xs (XV sudoku) by Lisztes (on 19. November 2020, 01:00) | 27 | 93 % |
| Parity Party (Odd-Even coded) by Realshaggy (on 11. February 2021, 21:55) | 24 | 98 % |
| Entroguity by twototenth (on 26. July 2022, 08:00) | 27 | 93 % |
