(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 | |
|---|---|---|---|
 | Max Arrows by antiknight (on 3. March 2023, 01:19) | 23 |  94 % |
| Stethoscope by JamesCullum (on 3. March 2023, 02:29) | 13 | 95 % |
| Round the Houses (Killer Loop) by tallcat (on 25. March 2023, 15:37) | 66 | 96 % |
| Lost In A Cave by Scojo (on 31. March 2023, 01:35) | 11 | 98 % |
| Clowns and Jokers by Die Hard (on 6. April 2023, 05:48) | 41 | 94 % |
| March of the Palindromes by EricRathbun (on 3. May 2023, 19:15) | 66 | 93 % |
| Waves by antiknight (on 7. April 2023, 03:07) | 32 | 91 % |
| Who Ordered The X-Sums? by RockyRoer (on 19. April 2023, 04:21) | 42 | 98 % |
| Interference (Masyu/Chaos Construction/Cipher) by dumediat (on 22. April 2023, 18:32) | 38 | 96 % |
| Cornerstones [Sum Dot Infinity Loop] by wisty (on 26. April 2023, 22:15) | 16 | 96 % |
| Push Me Pull You by Die Hard (on 29. April 2023, 04:35) | 39 | 97 % |
| Corner Market by 99%Sneaky (on 16. May 2023, 16:59) | 48 | 93 % |
| Hyperdrive by Myxo (on 20. June 2023, 14:22) | 43 | 95 % |
| Stacks of Arrows by PotatoHead21 (on 22. June 2023, 08:26) | 16 | 93 % |
| Trebuchet (Slingshot Multi-Sudoku) by tallcat (on 5. July 2023, 08:00) | 54 | 97 % |
| Cobweb by antiknight (on 29. June 2023, 19:28) | 19 | 90 % |
| Loopline by jojo81gaming (on 27. July 2023, 21:43) | 11 | 98 % |
| It's Raining Arrows by EricRathbun (on 1. October 2023, 08:38) | 24 | 93 % |
| Wurtzite by heliopolix (on 17. August 2023, 22:06) | 14 | 98 % |
| Good Things Come in Threes [Killer] by 3good5you (on 26. August 2023, 03:27) | 34 | 93 % |
