2Nc6

2Nc6 is not a standard standalone term in formal chess notation. In typical records, moves are written with a move number and punctuation, such as "2. Nc6" to indicate a knight moving to c6 on the second white move, or "2... Nc6" to indicate Black’s response on move 2. The form without punctuation or spacing may appear in informal texts, data dumps, or situations where characters are stripped, but its meaning is determined by context.

Meaning and disambiguation

Nc6 denotes a knight moving to the square c6. If only one knight can reach c6, the move is simply Nc6. If two knights could reach c6, the notation must disambiguate the origin, using the originating file or rank, for example Nbc6 or Ndc6 (and, if necessary, N7c6 or N2c6, depending on the specific square of origin). The exact form depends on which knight could legally move to c6 in the given position.

Examples

A common opening line is 1. e4 c5 2. Nf3 Nc6, where Black’s move to c6 occurs on move 2 and would be written in standard notation as 2... Nc6. Another position might yield White playing Nc6 on White’s second move, written as 2. Nc6 in a context where that move is legal for White.

See also

Chess notation, Algebraic notation, PGN, Knight moves, Disambiguation in chess notation.