(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 | |
|---|---|---|---|
 | Chocolate Banana Sandwiches by Scojo (on 1. August 2023, 07:53) | 44 |  97 % |
| X Gon' Give It To Ya by Justalilguy (on 7. February 2025, 17:11) | 45 | 96 % |
| Noughts and Crosses Somedoku by blackjackfitz (on 29. March 2024, 18:41) | 82 | 97 % |
| Sandwich/Killer Sudoku - Find x Part 3 by ProwlingTiger (on 27. May 2020, 20:00) | 27 | 94 % |
| Killer Sudoku 311 by Quarterthru (on 20. March 2021, 12:00) | 33 | 96 % |
| Yin Yang Arrows by Schwupel (on 23. September 2022, 19:36) | 136 | 99 % |
| Battle With The Archers 38: The War of Three Worlds by Playmaker6174 (on 10. April 2023, 05:37) | 53 | 96 % |
| Kropkikabe by MmeMagique (on 28. May 2023, 18:00) | 24 | 93 % |
| Let It Go (Nurikabe/Skyscraper/Fortress) by MaizeGator (on 24. June 2024, 00:20) | 29 | 98 % |
| Cage Match by silent_rob (on 29. July 2024, 08:00) | 29 | 93 % |
| Negative Space by ViKingPrime (on 26. December 2024, 02:35) | 30 | 94 % |
| Chainsaw by chameleon (on 22. April 2025, 09:10) | 27 | 95 % |
| AUTO - Buchstabenrätsel / Letter Puzzle by DocLogic (on 2. June 2025, 16:52) | 26 | 94 % |
| Up to Nosferatu (with ChinStrap) by sujoyku (on 31. October 2025, 10:00) | 24 | 99 % |
| June Pentomino Month (3) - Filled Liar Loop by Richard (on 21. June 2013, 12:00) | 54 | 97 % |
| Everything is Stavros96 (Palindrome Killer) by Stavros96 (on 14. January 2021, 07:51) | 63 | 98 % |
| Baltimore by ICHTUES (on 2. January 2022, 06:00) | 60 | 96 % |
| The Fantastic Four by oskode (on 19. May 2025, 06:23) | 124 | 97 % |
| Portal Dolmen 2 (Anti-Knight, German Whispers, ESL) by juddimal (on 24. May 2025, 22:30) | 65 | 93 % |
| Sudoku Variants Series (278) - Position Sums Sudoku by Richard (on 22. July 2020, 00:00) | 121 | 99 % |
