(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 | |
|---|---|---|---|
 | Six Hit Wonder by marty_sears (on 12. November 2025, 23:41) | 231 |  98 % |
| Position Sums Fillomino #2 by ONeill (on 23. October 2022, 05:47) | 34 | 99 % |
| The Graveyard Of Schrödinger by fjam (on 25. September 2023, 18:11) | 92 | 97 % |
| Entropy Sweeper by tesseralis (on 30. September 2023, 22:40) | 76 | 96 % |
| Lazy River (w/ Nordy) by mathpesto (on 8. February 2024, 18:27) | 76 | 96 % |
| Toroidaler Kosmos by usp (on 27. February 2015, 00:00) | 23 | 92 % |
| Morgen ist Ostern by ibag (on 26. March 2016, 05:00) | 26 | 97 % |
| Thermo's Adea by PotatoHead21 (on 30. April 2022, 23:07) | 24 | 92 % |
| Icing disaster (Region sum lines/X-sums) by dumediat (on 30. June 2023, 22:38) | 71 | 93 % |
| Stationary Loop Deconstruction (1-7) by Playmaker6174 (on 18. February 2025, 08:00) | 49 | 100 % |
| dodgeball champ by aqjhs (on 9. September 2025, 01:59) | 24 | 97 % |
| Rising Water by .proxz14 (on 1. March 2026, 12:35) | 22 | 99 % |
| Lonely Killers by Yawnus (on 11. March 2024, 12:14) | 112 | 97 % |
| Little Nuts by Qodec (on 12. May 2021, 12:55) | 42 | 96 % |
| Battle With The Archers 13: Unlucky Encounter by Playmaker6174 (on 27. August 2021, 19:14) | 38 | 95 % |
| Corotating Photon Sphere (Black Hole) by heliopolix (on 16. April 2023, 08:34) | 45 | 95 % |
| Hot Spot by juggler (on 21. August 2024, 09:35) | 72 | 97 % |
| Airlocks (Pentominous) by Gliperal (on 17. May 2021, 01:04) | 32 | 92 % |
| Disjoint Whispers by abed hawila (on 5. October 2021, 10:47) | 15 | 94 % |
| Tapa Mashup with Clones by Mark Sweep (on 25. February 2022, 10:00) | 35 | 98 % |
