(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 | |
|---|---|---|---|
 | Rumors (German Whispers) by tallcat (on 8. October 2021, 17:02) | 179 |  97 % |
| Totally Unfair 2 by Joseph nehme (on 11. December 2021, 08:24) | 23 | 96 % |
| Order Crossing (ft. Nordy) by damasosos92 (on 22. August 2023, 17:39) | 24 | 96 % |
| Not Just Once by jwsinclair (on 11. January 2024, 21:14) | 104 | 96 % |
| Wanna Make You Nine, Better Get In Line by ThePedallingPianist (on 27. December 2025, 14:40) | 24 | 91 % |
| Two Face [Arrow Renban GW Sudoku] by Christounet (on 29. December 2025, 23:19) | 73 | 96 % |
| Pebbles (Ambiguous XV/kropki pairs sudoku) by Qodec (on 13. August 2023, 11:59) | 58 | 92 % |
| Polynesia (Nurikabe Deconstruction) by Agent (on 27. September 2022, 09:00) | 111 | 99 % |
| Half The Killer I Used To Be by Djmelee3000 (on 1. September 2020, 00:17) | 35 | 93 % |
| Multi-sudoku: Orb 3 - Christmas snORBall by DiMono (on 20. December 2021, 18:14) | 31 | 98 % |
| Bloodcursed Arrows by ViKingPrime (on 18. February 2023, 23:00) | 34 | 93 % |
| Hybrid Star Battle Series (012) - Masyu by BenceJoful (on 26. March 2023, 16:31) | 32 | 94 % |
| You want sum? by Maximus (on 19. May 2024, 15:33) | 33 | 95 % |
| Another Mathematical Phenomenon by Xenonetix (on 25. September 2025, 01:10) | 33 | 94 % |
| Steady Climb (Topo) by juggler (on 12. February 2026, 10:50) | 40 | 90 % |
| Sudoku Variants Series (357) - X-Parity Sudoku by Richard (on 26. January 2022, 00:00) | 75 | 96 % |
| Miraculous Modular Loop by yttrio (on 22. September 2023, 20:30) | 77 | 94 % |
| Modular Zipper by gdc (on 7. December 2023, 12:07) | 78 | 95 % |
| Myopia by wuzzle (on 1. January 2021, 00:00) | 38 | 93 % |
| Wichtel 2020 (8): Das exotische Spätabendland by wichtel (on 23. September 2021, 22:00) | 36 | 99 % |
