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
|
|---|
 | Galaxy Killer #2
by Phistomefel (on 18. May 2020, 19:10) | 70 | 
94 %
|
| Teams Sudoku - Counts and Sums
by stephane.bura (on 31. May 2020, 14:27) | 23 |
97 %
|
| Wichtel 2019 (2): Bier oder Wein
by wichtel (on 29. June 2020, 19:20) | 33 |
97 %
|
| Parity Little Killer Sudoku
by Aspartagcus (on 16. July 2020, 23:04) | 17 |
94 %
|
| Killer Pentuplet, Little Twins, Little Squares & Odd Knights
by SudokuExplorer (on 23. August 2020, 00:00) | 21 |
99 %
|
| Teams Sudoku - Counts or Sums?
by stephane.bura (on 17. August 2020, 20:00) | 13 |
95 %
|
| Space Oddity - Irregular Parity Galaxy Killer Sudoku
by Yohann (on 20. August 2020, 11:18) | 23 |
98 %
|
| Pentominous Star Battle
by Jesper (on 7. September 2020, 08:25) | 88 |
95 %
|
| Battlefield Sandwich Sudoku - Fight For Lunch
by DiMono (on 7. September 2020, 18:16) | 25 |
91 %
|
| Killer Python
by jacksongriggs (on 8. September 2020, 05:29) | 13 |
98 %
|
| Pencil puzzle sudoku hybrid series #1 - Look-air sudoku
by Aspartagcus (on 28. October 2020, 11:11) | 13 |
90 %
|
| The Devil is in the Details
by Gliperal (on 31. October 2020, 02:50) | 54 |
96 %
|
| Japanischer Summen-Rundweg 2358 (2)
by Uhu (on 31. October 2020, 11:16) | 48 |
99 %
|
| Masyu Loop Sudoku
by Jesper (on 10. November 2020, 09:49) | 62 |
98 %
|
| Antiknight killer - Barcelona Floor Tile
by Ferranrojas (on 12. November 2020, 01:32) | 26 |
96 %
|
| Mystery Sandwich Sudoku
by cdwg2000 (on 11. January 2021, 23:11) | 14 |
95 %
|
| The Python (Palindrome)
by ICHTUES (on 15. November 2020, 06:00) | 31 |
95 %
|
| Skyline
by Qodec (on 12. December 2020, 11:12) | 50 |
96 %
|
| The Night Before Christmas Sudoku
by JonnyKaufman (on 23. December 2020, 17:44) | 30 |
96 %
|
| XY Differences V, "Knapp daneben"
by glum_hippo (on 29. December 2020, 17:39) | 21 |
95 %
|
