(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 | |
|---|---|---|---|
 | obezyanka nol by aqjhs (on 30. August 2024, 08:07) | 26 |  95 % |
| Interlinked by oklux (on 8. January 2025, 11:11) | 30 | 94 % |
| Exogenous by NicoD (on 11. September 2025, 05:30) | 28 | 97 % |
| The Balance of Fire and Water by Mad-Tyas (on 17. March 2026, 15:33) | 25 | 96 % |
| Tree(3) by PulverizingPancake (on 4. November 2021, 19:25) | 76 | 97 % |
| Die Kryptos - S02E02: A 38 by tuace (on 16. March 2018, 15:10) | 45 | 95 % |
| Ten Arrows (Classic Arrow Sudoku) by EliasKar (on 5. February 2021, 01:35) | 51 | 97 % |
| Battle With The Archers 3: The Suspicious Butterfly by Playmaker6174 (on 14. June 2021, 13:06) | 70 | 96 % |
| Liar Sudoku - Everything Is Wrogn by DiMono (on 18. September 2020, 19:23) | 103 | 98 % |
| U-Bahn unter Hochhäusern (Teil 5) by Zzzyxas (on 31. March 2012, 16:17) | 63 | 99 % |
| Japanischer Summen-Rundweg (knapp daneben, vielleicht) by Uhu (on 4. May 2017, 20:25) | 43 | 97 % |
| Snake Sum Sudoku 2 by Quarterthru (on 30. June 2020, 00:00) | 27 | 99 % |
| The 6 Sudokus of Christmas by Stavros96 (on 10. December 2020, 01:26) | 45 | 99 % |
| Yajilin Total/Regions 3 by Dandelo (on 4. January 2021, 22:10) | 25 | 99 % |
| Castle Wall by Mark Sweep (on 22. January 2021, 10:00) | 23 | 91 % |
| Thermo Arrow Sudoku by Lizzy01 (on 27. April 2021, 17:15) | 24 | 95 % |
| Pentominominous by emmettcito (on 22. May 2021, 18:51) | 22 | 99 % |
| O/E Little Killers by JoWovrin (on 4. June 2021, 22:50) | 22 | 96 % |
| Which Direction? by Lisztes (on 7. December 2021, 01:00) | 24 | 97 % |
| Perpetual Motion of Kind '0' (Sudoku 26) by Sumanta(ANU) (on 12. May 2022, 13:51) | 25 | 93 % |
