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
|
|---|
 | Chaos Construction: Circle Sum (9x9)
by Jesper (on 15. January 2024, 15:10) | 89 | 
100 %
|
| Heatstroke (Classic Thermo)
by emmettcito (on 11. April 2021, 12:27) | 45 |
99 %
|
| Quandary
by grkles (on 25. August 2021, 13:14) | 21 |
99 %
|
| Strange Loop
by Andrewsarchus (on 28. September 2021, 16:33) | 43 |
98 %
|
| Shuttle islands [Nurikabe U-Bahn Bridges 13x14]
by Christounet (on 16. January 2024, 01:00) | 20 |
97 %
|
| U-Bahn with Extra Regions
by wooferzfg (on 2. July 2024, 07:46) | 20 |
100 %
|
| Shade Your Own Puzzle: YinYang vs Sudoku #2
by Playmaker6174 (on 27. September 2024, 09:00) | 22 |
93 %
|
| Wichtel 2014 (9): Weihnachtsbaum
by wichtel (on 19. March 2015, 01:24) | 38 |
99 %
|
| Parity Party XXII, "Party Hearty"
by glum_hippo (on 4. January 2022, 04:19) | 40 |
99 %
|
| Chaos Sums
by wooferzfg (on 28. December 2022, 15:49) | 34 |
98 %
|
| Missing Digits
by FryTheGuy (on 15. January 2023, 21:01) | 18 |
95 %
|
| Blind spot [Narrow Cave Sudoku Deconstruction 9x9]
by Christounet (on 23. November 2023, 14:00) | 34 |
98 %
|
| Kakuro S-Cells Loop Knapp Daneben Jigsaw [Secret Satan #2]
by Christounet (on 30. January 2024, 18:55) | 15 |
98 %
|
| Japanese Sums Narrow Cave Cipher: Mirrors (11x11)
by Jesper (on 2. June 2023, 16:04) | 28 |
100 %
|
| Diagonal Chaos Construction
by Paletron (on 16. October 2023, 18:20) | 32 |
98 %
|
| Giant Tapa
by wooferzfg (on 25. February 2024, 04:22) | 30 |
93 %
|
| X (Chaos Construction)
by tallcat (on 11. April 2024, 07:00) | 60 |
97 %
|
| Wichtel 2017 (10): Luftige Flotte an Wolkenmousse in inversem Schneegestöber
by wichtel (on 17. October 2018, 07:04) | 24 |
99 %
|
| Fourteen (Killer Sudoku)
by FryTheGuy (on 8. August 2021, 08:13) | 69 |
99 %
|
| Regional Chess Sums: A Proper Introduction
by Nordy (on 24. January 2022, 09:30) | 12 |
93 %
|
