NITER
| Date | Clue |
|---|---|
| 2026-03-22 | Component of fertilizer and gunpowder |
| 2024-11-24 | Fireworks ingredient |
| 2024-01-14 | Gunpowder ingredient |
| 2023-12-27 | Crystalline mineral deposits in some caves |
| 2012-12-22 | Pyrotechnics compound |
| 2011-04-02 | Atacama Desert export |
| 2006-12-29 | KNO3 |
| 2006-12-08 | Munitions compound |
| 2005-09-11 | Gunpowder ingredient |
| 2003-11-05 | Gunpowder component |
| 2001-06-24 | Gunpowder ingredient |
| 2001-05-12 | Compound in fireworks |
| 1999-11-12 | Fertilizer ingredient |
| 1997-04-07 | Gunpowder ingredient |
| 1996-12-01 | Potassium compound |
| 1995-08-22 | KNO3 |
| 1995-05-09 | KNO3 |