(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 | |
|---|---|---|---|
 | Manhattan by starwarigami (on 10. October 2023, 10:59) | 16 |  95 % |
| Wichtel 2022 (9 und vorläufig Schluss): Die Wichtel in Pental by wichtel (on 1. December 2023, 23:23) | 12 | 98 % |
| Wichtels Rätselsommer 2024 (4): Wirrwarr im Garten by wichtel (on 22. August 2024, 20:23) | 12 | 100 % |
| Rowena and Colin by Mad-Tyas (on 29. August 2025, 16:38) | 25 | 93 % |
| Jörmungandr by Jay Dyer (on 2. June 2022, 13:46) | 177 | 99 % |
| Di-agony! by ThePedallingPianist (on 24. November 2022, 17:07) | 69 | 97 % |
| Confluence by mathpesto (on 24. April 2023, 17:00) | 65 | 98 % |
| Schrödinger Sudkuro by ICHTUES (on 30. October 2022, 06:00) | 48 | 98 % |
| Sun Chariot by Miky (on 14. April 2021, 00:17) | 45 | 94 % |
| Aqres of Shikaku Country (9x9) by mathpesto (on 29. October 2022, 22:57) | 35 | 98 % |
| Giant Tapa by wooferzfg (on 25. February 2024, 04:22) | 37 | 91 % |
| Dedicated to wisty by Myxo (on 21. January 2025, 14:25) | 35 | 93 % |
| Thermo Sudoku by trivial171 (on 6. September 2020, 19:48) | 61 | 97 % |
| Zweiter Pfeilchenstrauß by glum_hippo (on 24. August 2020, 17:26) | 25 | 93 % |
| Compass Fillomino #3: Large grid by MagnusJosefsson (on 23. April 2021, 17:44) | 47 | 97 % |
| Imbalanced Flower by MavericksJD (on 19. June 2022, 21:33) | 31 | 92 % |
| The Fifteenth Day of Christmas by cristophermoore (on 18. December 2022, 07:01) | 50 | 98 % |
| Matchaluck (A Meidjuluk N=15 Variant) by PrimeWeasel (on 11. October 2023, 11:41) | 25 | 100 % |
| Japanese Slitherlink by KNT (on 27. October 2024, 22:43) | 49 | 97 % |
| Mirror Mirror by Andrewsarchus (on 18. October 2025, 13:58) | 27 | 93 % |
