(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 | |
|---|---|---|---|
 | Throwing Shade by tesseralis (on 19. June 2022, 01:25) | 28 |  98 % |
| Breach by vitaminz (on 16. May 2024, 00:15) | 33 | 98 % |
| Quivering quiver by NicoD (on 3. June 2025, 05:30) | 39 | 91 % |
| Befuddlement by Oddlyeven (on 8. July 2025, 03:01) | 145 | 98 % |
| Hide and Seek by Jooshy (on 2. December 2025, 18:55) | 46 | 94 % |
| X---V*3 by NurglesGift (on 28. March 2025, 06:00) | 91 | 96 % |
| 5K 5T by Joseph nehme (on 24. April 2021, 06:31) | 54 | 97 % |
| Archer's Prologue: Positive Mindset by Playmaker6174 (on 13. November 2021, 06:05) | 59 | 98 % |
| Yin-Yang Fillomino by Phistomefel (on 7. January 2021, 01:21) | 76 | 98 % |
| Sudoku Variants Series (305) - Encaged Kropki Sudoku by Richard (on 27. January 2021, 00:00) | 73 | 97 % |
| Chocolate Teapot by Qodec (on 5. May 2021, 16:01) | 74 | 97 % |
| Ripples by riffclown (on 4. August 2023, 21:59) | 77 | 96 % |
| Noughts and Crosses Somedoku by blackjackfitz (on 29. March 2024, 18:41) | 84 | 97 % |
| ZAUBERN - MAGIE - Buchstabenrätsel by DocLogic (on 13. February 2020, 22:25) | 38 | 91 % |
| Carpet Sudoku III: Cleopatra's Tryst by jackisaacbryan (on 26. September 2020, 22:49) | 24 | 98 % |
| Sudoku Variants Series (292) - Coordinates Sudoku by Richard (on 28. October 2020, 00:00) | 63 | 96 % |
| The c(l)over-up by Sktx (on 6. July 2021, 12:29) | 25 | 91 % |
| Color Palette by Joseph nehme (on 18. December 2022, 10:14) | 129 | 97 % |
| Doublophobia by lepton (on 7. January 2023, 08:38) | 21 | 97 % |
| Sick and Twisted Sandwiches by Andrewsarchus (on 10. January 2023, 04:15) | 17 | 98 % |
