| Date | Subject |
|---|---|
| December 20, 2007 | Enigma 1446 - Crossed words |
| February 5, 2008 | Enigma 1470 - Dicey dice |
| March 17, 2008 | Enigma 1475 - Lines of thought |
| August 7, 2008 | Enigma 1499 - Not quite right |
| August 10, 2008 | Enigma 1499 - Not quite right |
| September 25, 2008 | Enigma 1505 - Brief N-counter |
| October 4, 2008 | Enigma 1505 - Brief N-counter |
| August 19, 2011 | Enigma 1654 - Tricky cards |