Opening family

Three Knights Opening Lines and Variations

The Three Knights Opening family contains 6 named lines in this opening book, spanning ECO C46. Use this page as the map, then open individual lines for exact move orders and diagrams.

Named lines

ECO coverage

C46

ECO volume

C (open games after 1.e4 e5 plus the French Defense)

Shortest line

C46 Three Knights Opening: 1. e4 e5 2. Nf3 Nc6 3. Nc3

How to study this family

White

White should use the move order as a checkpoint: finish development, identify the central break, and compare the continuations below before memorizing moves.

Black

Black should ask what White is threatening in the center, then choose development moves that prepare a clean pawn break or a useful exchange.

Start with the shortest line, then branch to the variations that change the pawn structure or tactical target. Memorizing every branch before understanding the family plan is usually wasted work.

Main named lines

Deep theory branches

Start with the root line Drill this family