General Terms
What is a NCO in chess?
- Concept
- Vocabulary
- Chess
NCO is a chess abbreviation. In practical terms, it refers to an abbreviation for Nunn's Chess Openings, a chess openings reference. Compare ECO and MCO. If you see it in a database, book, or tournament page, treat it as shorthand and check the surrounding context.
Related terms
Free game review
See where nco decides your games
Chessiro reviews your games with an AI coach that names the concept behind every mistake, then drills you on the exact positions where it happened until you stop repeating them.