(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 | |
|---|---|---|---|
 | Das Boot - GW and DW Sudoku by Mr.Menace (on 19. November 2021, 09:31) | 41 |  92 % |
| The Final Shot: Four Corners 4 (Renban Arrow X) by tallcat (on 7. January 2022, 04:45) | 44 | 94 % |
| The Goldilocks Zone by marty_sears (on 14. September 2024, 15:04) | 127 | 99 % |
| Für pin7guin zum Geburtstag: Buchstaben-Kropki auf Magnetplatten by CHalb (on 6. September 2018, 23:58) | 40 | 99 % |
| This one goes to 11 by SuperMikal (on 13. November 2024, 20:18) | 46 | 94 % |
| Roses by PulverizingPancake (on 20. May 2021, 22:55) | 47 | 99 % |
| What's Literally Eating Gilbert Grape by Thorsby (on 11. December 2022, 08:06) | 45 | 97 % |
| Twirl by SudokuExplorer (on 3. January 2023, 14:00) | 46 | 96 % |
| TapaS (the “S” is for SchrödingerS (that “S” is a typo)) by mathpesto (on 5. May 2023, 18:14) | 43 | 95 % |
| The Keep by Myxo (on 31. January 2025, 15:00) | 47 | 93 % |
| Six-pack Linked Sudokus by Genomico (on 25. August 2020, 00:57) | 90 | 97 % |
| Dimorphism by Jay Dyer (on 19. April 2023, 10:34) | 89 | 97 % |
| Reticulated Python by mathpesto (on 27. March 2022, 04:58) | 91 | 97 % |
| Coelacanth by Kafkapharnaum (on 1. April 2023, 20:20) | 50 | 99 % |
| Japanischer Summen-Rundweg 2358 (2) by Uhu (on 31. October 2020, 11:16) | 46 | 99 % |
| Loopki by Senor Dingdong (on 8. July 2009, 15:15) | 48 | 90 % |
| Teleportation Cycle Sum Sudoku by SudokuExplorer (on 6. April 2021, 01:00) | 49 | 100 % |
| Basket by Jay Dyer (on 10. October 2024, 23:37) | 111 | 98 % |
| Japanisches Memory by ibag (on 26. September 2014, 20:37) | 47 | 99 % |
| Roller Coaster mit Extras 10 by Uhu (on 28. September 2018, 20:57) | 49 | 97 % |
