| Alberti Challenge — Part 1 | 100 | Feb. 16, 2023, 11:21 p.m. |
| Classical Ciphers^3 | 100 | Feb. 16, 2023, 2:36 a.m. |
| Monoalphabetic Substitution | 100 | Feb. 13, 2023, 11:25 p.m. |
| ADFGVX — Part 2 | 100 | Feb. 13, 2023, 5:01 p.m. |
| ADFGVX — Part 1 | 100 | Feb. 12, 2023, 11:16 p.m. |
| Reserve Hand Procedure — Part 1 | 100 | Feb. 10, 2023, 5:04 p.m. |
| The Syllabary Cipher – Part 1 | 200 | Oct. 28, 2022, 5:08 p.m. |
| Number Sequence — Part 7 | 100 | Aug. 5, 2022, 3:27 p.m. |
| Wheatstone Cryptograph — Part 1 | 101 | Oct. 4, 2021, 4:43 p.m. |
| Find the right route — Part 3 | 101 | March 25, 2021, 11:18 p.m. |
| Modular Sequences | 100 | Dec. 11, 2020, 3:52 p.m. |
| Find the right route — Part 1 | 102 | Dec. 11, 2020, 1:29 a.m. |
| Number Sequence — Part 10 | 100 | Dec. 8, 2019, 2:12 a.m. |
| Advent-Challenge — Part 1 | 111 | Dec. 17, 2017, 7:19 p.m. |
| Number Sequence — Part 8 | 100 | Sept. 12, 2017, 11:45 p.m. |
| Affine Codes / Modulo Arithmetic with N / Extended Euclid | 100 | July 26, 2016, 7:22 a.m. |
| The Last Note | 100 | July 21, 2016, 12:30 a.m. |
| Number Sequence — Part 5 | 100 | July 20, 2016, 8:39 p.m. |
| Factorization Cipher — Part 1 | 100 | June 8, 2016, 8:27 p.m. |
| New Year's Greetings — Part 4 | 133 | March 23, 2016, 12:44 p.m. |
| New Year's Greetings — Part 3 | 150 | March 23, 2016, 12:12 a.m. |
| New Year's Greetings — Part 2 | 150 | March 22, 2016, 11:46 p.m. |
| New Year's Greetings — Part 1 | 150 | March 22, 2016, 11:02 p.m. |
| M-138 — Part 1 | 100 | March 18, 2016, 2:44 p.m. |
| Number Sequence — Part 4 | 100 | March 16, 2016, 2:11 p.m. |
| How do you become a big cryptographer? | 100 | March 16, 2016, 1:40 p.m. |
| Modified Caesar Cipher | 100 | Feb. 21, 2016, 1:01 p.m. |
| Grille Cipher | 100 | Feb. 3, 2016, 10:30 p.m. |
| Beaver Code | 100 | Feb. 1, 2016, 12:33 a.m. |
| A hidden word | 100 | Jan. 27, 2016, 11:54 p.m. |
| Letter to the Templars — Part 3 | 1,113 | Jan. 16, 2016, 12:43 a.m. |
| Letter to the Templars — Part 2 | 100 | Jan. 15, 2016, 10:59 p.m. |
| Letter to the Templars — Part 1 | 100 | Jan. 13, 2016, 11:57 p.m. |
| Number Sequence — Part 3 | 100 | Jan. 10, 2016, 10:24 p.m. |
| Caesar Encryption | 100 | Jan. 10, 2016, 2:41 p.m. |
| Original Caesar Cipher | 100 | Jan. 10, 2016, 2:35 p.m. |
| Number Sequence — Part 2 | 100 | Jan. 10, 2016, 2:32 p.m. |
| Number Sequence | 100 | Jan. 10, 2016, 2:27 p.m. |