(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 | |
|---|---|---|---|
 | RAT RUN 13: Triskaidekaphilia by marty_sears (on 6. November 2024, 02:13) | 883 |  97 % |
| Hitchcocks Krypto ABCtje by tuace (on 29. September 2014, 11:55) | 31 | 95 % |
| Consecutive Manhattan Sudoku by Madmahogany (on 27. June 2020, 00:26) | 51 | 93 % |
| 2021 by RockyRoer (on 31. December 2020, 00:00) | 47 | 93 % |
| Coprime Directive by cristophermoore (on 12. March 2021, 07:20) | 17 | 93 % |
| Daffodil by jovi_al (on 15. April 2021, 22:57) | 67 | 95 % |
| Trace by djorr (on 3. June 2021, 15:12) | 18 | 90 % |
| Friendly Sums by Jay Dyer (on 30. December 2021, 21:31) | 16 | 95 % |
| Stay Outside by EricRathbun (on 5. May 2022, 00:03) | 20 | 94 % |
| Code 62 (Hi-five) (Sudoku 22) by Sumanta(ANU) (on 11. April 2022, 13:35) | 40 | 96 % |
| Toothbrushes by krangune (on 8. May 2022, 12:49) | 36 | 97 % |
| Proximity by XeonRisq (on 4. June 2022, 23:00) | 15 | 98 % |
| Merry Camel to you! by panthchesh (on 19. December 2022, 19:30) | 22 | 91 % |
| Should I Goodliffe The Thermo? by GBPack (on 4. April 2023, 01:18) | 20 | 95 % |
| Colorguru Chaos Deconstruction: Arrows Edition by crispy16 (on 26. July 2023, 20:50) | 17 | 98 % |
| Cross-functional arrows by arbitrary (on 31. March 2024, 14:56) | 19 | 90 % |
| Zeros and Negatives Don’t Mix (0-9 Challenge) by The Bard (on 1. August 2024, 23:40) | 26 | 91 % |
| [TSL][S1T1] Red is innocent by ademjaz (on 13. October 2024, 18:00) | 15 | 93 % |
| Copycat Mates by Scojo (on 28. October 2024, 02:33) | 20 | 91 % |
| Breaking the Cycle [Slingshot] by 3good5you (on 28. January 2025, 19:55) | 18 | 98 % |
