(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 | |
|---|---|---|---|
 | Nexus [Fog of War Sudoku] by wisty (on 6. March 2023, 02:14) | 83 |  92 % |
| Cavino Royale (Canal View Nonogram) by PrimeWeasel (on 22. April 2024, 09:23) | 36 | 99 % |
| Killer ratio by jcgodart (on 23. October 2024, 09:38) | 32 | 92 % |
| 24 Rätsel in 24 Stunden (Teil 14) - Fillomino by Zzzyxas (on 24. June 2017, 13:24) | 79 | 93 % |
| High Winds (Arrow Sudoku) by Agent (on 16. May 2021, 09:00) | 35 | 95 % |
| Insight by Xenonetix (on 15. January 2022, 04:54) | 35 | 96 % |
| TTOL by ICHTUES (on 27. December 2024, 10:00) | 40 | 92 % |
| Dadly Sandwich by Cane_Puzzles (on 30. June 2022, 17:11) | 42 | 96 % |
| Stranded Friends by DarthParadox (on 14. July 2023, 00:12) | 41 | 94 % |
| Wheels on the Bus (Wheels, Disjoint) by Crusader175 (on 21. August 2023, 17:00) | 50 | 93 % |
| Put a ring on it (if you like it) by Ali M (on 26. March 2024, 16:32) | 49 | 94 % |
| Sudoku Variants Series (275) - Confetti Sums Sudoku by Richard (on 1. July 2020, 00:00) | 97 | 98 % |
| Stay in Your Box by marty_sears (on 2. February 2025, 03:58) | 101 | 97 % |
| Krypto-X-Summen mit Zerrspiegeln by ibag (on 26. June 2019, 00:00) | 47 | 98 % |
| Product Ltd. by BoaConstructor (on 30. July 2020, 12:57) | 52 | 97 % |
| Sextuple by Blashyrkh (on 24. July 2023, 12:36) | 48 | 94 % |
| Left Out by fritzdis (on 26. February 2021, 04:57) | 52 | 97 % |
| Sudoku Variants Series (328) - Sudoku Heatmap by Richard (on 7. July 2021, 00:00) | 56 | 94 % |
| Battle With The Archers 16: Judgment Trio by Playmaker6174 (on 17. September 2021, 12:12) | 53 | 97 % |
| 23 Renban by Florian Wortmann (on 8. February 2023, 19:32) | 103 | 97 % |
