(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 | |
|---|---|---|---|
 | Sandwich Capsules by RockyRoer (on 28. March 2021, 22:17) | 39 |  99 % |
| The Incomplete Diamond by Niverio (on 14. July 2021, 15:19) | 35 | 96 % |
| COCKTAIL - Buchstabenrätsel / Letter Puzzle by DocLogic (on 26. August 2022, 13:55) | 32 | 93 % |
| What's in the Box? by lmdemasi (on 22. August 2024, 13:56) | 42 | 96 % |
| Foggy Fillomino by Die Hard (on 31. December 2024, 23:24) | 81 | 94 % |
| dear puzzle friend by aqjhs (on 14. February 2025, 06:06) | 41 | 94 % |
| Creepy Crawly (Killer Sudoku) by Phistomefel (on 28. February 2023, 07:35) | 111 | 97 % |
| Little Big Killer Sudoku (updated) by Shinya (on 16. June 2020, 08:00) | 37 | 98 % |
| Two Rights and a Wrogn by SirWoezel (on 20. July 2022, 21:57) | 36 | 95 % |
| Arrowslits by antiknight (on 19. September 2022, 18:50) | 34 | 94 % |
| Cross Stitching 101 (Equalines Sudoku) by Sktx (on 1. November 2022, 15:51) | 32 | 90 % |
| Bashful Cages by Ennead (on 30. November 2022, 21:21) | 32 | 93 % |
| Skyscraper Slingshot Sudoku #2 by Piatato (on 1. March 2023, 23:49) | 31 | 99 % |
| ↻ Somedoku-Loop ↺ by ElChiglia (on 27. April 2024, 07:05) | 32 | 92 % |
| Battle With The Archers 3: The Suspicious Butterfly by Playmaker6174 (on 14. June 2021, 13:06) | 64 | 98 % |
| Irregular Miracle by emmettcito (on 12. August 2020, 01:56) | 36 | 91 % |
| Chaotic Indexers by mathpesto (on 15. July 2022, 22:15) | 31 | 100 % |
| Mexican Train by ViKingPrime (on 9. May 2023, 14:00) | 32 | 99 % |
| Orla The Octopus by ThePedallingPianist (on 9. February 2024, 19:41) | 32 | 99 % |
| Double Arrow Melt by Black_Doom (on 8. May 2024, 19:06) | 33 | 96 % |
