Current position
Ruy Lopez: Berlin Defense, Rio de Janeiro Variation
1.e4 e5 2.Nf3
The King's Knight Opening starts with 1.e4 e5 2.Nf3 and is catalogued under ECO C40, in the open games & french half of the book. The catalog indexes 3 lines inside it, grouped into 3 named variations, and the position after those moves has 1 playable continuation to walk from here.
Root edges show how often each move is played around your Elo. Use the arrow on a position to reveal the next replies.
Current setup
Move ideas
Claims the center with a pawn and opens lines for the queen and king’s bishop.
Idea: Build quick development and make early castling possible.
Meets White’s center directly and opens lines for Black’s queen and bishop.
Idea: Fight for equal central space in a balanced, open position.
Develops the king’s knight and attacks Black’s e5-pawn.
Idea: Increase central pressure while getting ready to castle.
Defends e5 while developing the queen’s knight toward the center.
Idea: Hold the central pawn and keep several classical setups available.
Develops the bishop and pressures the knight that helps defend e5.
Idea: Create long-term pressure on Black’s center before deciding whether to exchange.
Develops the knight to f6, bringing it into the game.
Idea: Improve piece coordination and clear the back rank for castling and the rooks.
Tucks the king away and activates the rook in a single move.
Idea: Finish kingside development so the central pieces can coordinate safely.
Captures the pawn on e4 and changes the local pawn or piece balance.
Idea: Remove an active defender and improve the moving piece’s influence.
Advances to d4 to claim central space and control nearby key squares.
Idea: Give the pieces room to develop behind a durable central foothold.
Develops the bishop to e7, bringing it into the game.
Idea: Improve piece coordination and clear the back rank for castling and the rooks.
Repositions the queen to e2, where it influences a new part of the board.
Idea: Coordinate threats carefully while avoiding unnecessary tempi against the queen.
Repositions the knight to d6, where it influences a new part of the board.
Idea: Improve the piece’s activity and support the next stage of the plan.
Captures the knight on c6 and changes the local pawn or piece balance.
Idea: Remove an active defender and improve the moving piece’s influence.
Captures the bishop on c6 and changes the local pawn or piece balance.
Idea: Open lines in the queenside and reshape the center for the next phase.
Captures the pawn on e5 and changes the local pawn or piece balance.
Idea: Open lines in the center and reshape the center for the next phase.
Repositions the knight to b7, where it influences a new part of the board.
Idea: Improve the piece’s activity and support the next stage of the plan.
Develops the knight to c3, bringing it into the game.
Idea: Improve piece coordination and clear the back rank for castling and the rooks.
Tucks the king away and activates the rook in a single move.
Idea: Finish kingside development so the central pieces can coordinate safely.
Repositions the rook to e1, where it influences a new part of the board.
Idea: Improve the piece’s activity and support the next stage of the plan.
Repositions the knight to c5, where it influences a new part of the board.
Idea: Improve the piece’s activity and support the next stage of the plan.
Repositions the knight to d4, where it influences a new part of the board.
Idea: Improve the piece’s activity and support the next stage of the plan.
Repositions the knight to e6, where it influences a new part of the board.
Idea: Improve the piece’s activity and support the next stage of the plan.
Develops the bishop to e3, bringing it into the game.
Idea: Improve piece coordination and clear the back rank for castling and the rooks.
Captures the knight on d4 and changes the local pawn or piece balance.
Idea: Remove an active defender and improve the moving piece’s influence.
Waiting for Lichess game popularity.
Each line below is an indexed entry under King's Knight Opening. Open one to load it on the board and keep exploring from that position.
ECO groups openings by the structures they lead to, so these families tend to share plans with the King's Knight Opening.