(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 | |
|---|---|---|---|
 | Anti-knight × killer × arrow by psninn (on 7. November 2024, 14:13) | 81 |  94 % |
| The Train and the Fly by marty_sears (on 16. August 2024, 11:13) | 101 | 95 % |
| Auf dem Oktoberfest by pirx (on 21. September 2013, 12:00) | 35 | 99 % |
| Die Kryptos - S01E06: ABC-Box by tuace (on 24. September 2017, 11:48) | 53 | 96 % |
| Partial Killer 1 by MavericksJD (on 23. September 2020, 09:41) | 59 | 93 % |
| Hybridsudoku, „Der kleine Trommler“ by glum_hippo (on 22. December 2020, 20:54) | 49 | 94 % |
| Sudoku Variants Series (307) - Sum Snake Sudoku by Richard (on 10. February 2021, 00:00) | 83 | 96 % |
| "Doughts" for Bigger by PetLov (on 12. March 2021, 10:00) | 15 | 95 % |
| Sagitta by Joseph nehme (on 29. May 2021, 06:13) | 40 | 94 % |
| Sándor Tótka (Tokyo 2020) by Lisztes (on 11. August 2021, 01:00) | 17 | 90 % |
| Familiar combo by PetLov (on 14. August 2021, 20:32) | 16 | 91 % |
| Mutant Fillomino by au voleur! (on 19. February 2022, 18:03) | 26 | 95 % |
| Battle With The Archers 31: When Allies Collide by Playmaker6174 (on 29. April 2022, 22:59) | 70 | 98 % |
| CtC 500k Tribute by apiyo (on 30. August 2022, 05:56) | 14 | 91 % |
| Wichtel 2022 (3): Weihnachtsgeisterbahn by wichtel (on 13. September 2023, 10:10) | 15 | 100 % |
| Pseudogenes by ViKingPrime (on 5. February 2024, 21:00) | 11 | 98 % |
| Δ Polygon Doppelganger by KenGlue (on 14. February 2024, 21:31) | 14 | 95 % |
| Plum by pieguy (on 27. February 2024, 17:45) | 13 | 91 % |
| Yin-Yang Renbanominos 2 by Die Hard (on 12. May 2024, 00:06) | 12 | 93 % |
| San Diego by SenatorGronk (on 21. August 2024, 02:49) | 27 | 94 % |
