(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 | |
|---|---|---|---|
 | The Juggler [Modular Lines, Kropki Pairs] by Malrog (on 13. March 2024, 13:03) | 24 |  94 % |
| Wavecatcher by Nordy (on 14. April 2024, 09:00) | 25 | 95 % |
| Tellurium Chaos by Nityant5 (on 12. May 2021, 13:02) | 70 | 100 % |
| Monsoon by heliopolix (on 9. November 2023, 00:08) | 51 | 96 % |
| Zippery When Wet by marty_sears (on 20. November 2023, 03:01) | 131 | 99 % |
| I'll Cry If I Want To by FullDeck-Missing (on 30. March 2023, 16:32) | 118 | 95 % |
| Japanischer Summen-Rundweg (knapp daneben, vielleicht) by Uhu (on 4. May 2017, 20:25) | 43 | 97 % |
| Snake Sum Sudoku 2 by Quarterthru (on 30. June 2020, 00:00) | 27 | 99 % |
| The 6 Sudokus of Christmas by Stavros96 (on 10. December 2020, 01:26) | 45 | 99 % |
| Yajilin Total/Regions 3 by Dandelo (on 4. January 2021, 22:10) | 25 | 99 % |
| Thermo Arrow Sudoku by Lizzy01 (on 27. April 2021, 17:15) | 23 | 95 % |
| O/E Little Killers by JoWovrin (on 4. June 2021, 22:50) | 22 | 96 % |
| Which Direction? by Lisztes (on 7. December 2021, 01:00) | 22 | 97 % |
| Perpetual Motion of Kind '0' (Sudoku 26) by Sumanta(ANU) (on 12. May 2022, 13:51) | 24 | 93 % |
| Very Friendly by PrimeWeasel (on 22. December 2022, 10:57) | 21 | 100 % |
| Pitter Patter by meggen033 (on 8. February 2023, 08:15) | 31 | 94 % |
| Microcircuit by Andrewsarchus (on 20. February 2023, 18:31) | 23 | 94 % |
| vaddsetspi by zzw (on 24. September 2023, 06:41) | 25 | 98 % |
| Say, What Do Little Killers Eat? by RockyRoer (on 25. July 2024, 20:18) | 20 | 93 % |
| Cage Scraper by glum_hippo (on 24. January 2021, 06:00) | 50 | 97 % |
