IMPASSE
| Date | Clue |
|---|---|
| 2024-09-26 | Intractable situation |
| 2023-07-18 | Deadlocked situation |
| 2023-03-26 | Deadlock |
| 2021-09-18 | Deadlock |
| 2021-06-30 | Stalemate |
| 2017-11-12 | Roadblock |
| 2017-01-26 | Deadlock |
| 2015-08-18 | Stalemate |
| 2011-01-11 | Standoff |
| 2008-12-12 | You can't escape from it |
| 2008-10-09 | Deadlock |
| 2007-12-14 | Deadlock |
| 2004-12-23 | Deadlock |
| 2000-08-18 | Roadblock |
| 2000-05-06 | Mediator's problem |
| 1999-10-02 | Standoff |
| 1999-01-19 | Stalemate |
| 1998-04-09 | Stalemate |
| 1997-01-25 | Negotiators' problem |
| 1994-03-20 | Deadlock |
| 1994-03-08 | Catch-22 situation |
| 1994-02-06 | Full stop |