PNIN
| Date | Clue |
|---|---|
| 2018-03-23 | Titular professor in a Nabokov novel |
| 2017-09-27 | Nabokov novel |
| 2015-07-10 | Nabokov novel |
| 2014-07-24 | Nabokov novel after "Lolita" |
| 2014-02-13 | Nabokov novel after "Lolita" |
| 2010-11-27 | Nabokov novel |
| 2010-08-15 | Vladimir Nabokov novel |
| 2007-02-03 | Nabokov novel |
| 2006-12-16 | Nabokov novel |
| 2006-02-15 | 1957 Nabokov novel |
| 2005-11-26 | Title professor in a 1957 novel |
| 2004-06-17 | Nabokov novel |
| 2002-10-27 | Nabokov novel |
| 1997-03-23 | 1957 Nabokov novel |
| 1997-02-13 | Nabokov novel |
| 1995-01-22 | Nabokov book, 1957 |
| 1994-11-01 | Nabokov novel |