English Opening: King's English Variation, Three Knights System

1.c4 e5 2.Nc3 Nc6 3.Nf3

ECO A27

The English Opening: King's English Variation, Three Knights System is a chess opening line in the English Opening complex, reached after 1.c4 e5 2.Nc3 Nc6 3.Nf3.

It is catalogued under code A27 in the Encyclopaedia of Chess Openings (ECO).

The defining move Nf3 is chosen by White on move 3.

Study this line with a grandmaster

This position is covered in the English Opening course: a GM-authored repertoire you study move by move, then practice against a human-like AI opponent.

Every chess term used here is defined in the chess terms glossary. Browse all opening courses or the full ECO code index.