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The King's Knight Opening is a chess opening consisting of the moves: . 1. e4 e5 2. Nf3. White's second move attacks the e-pawn. Black usually defends this with 2...Nc6, which leads to several named openings.
In chess, a relative value (or point value) is a standard value conventionally assigned to each piece. Piece valuations have no role in the rules of chess but are useful as an aid to evaluating a position. The best-known system assigns 1 point to a pawn, 3 points to a knight or bishop, 5 points to a rook and 9 points to a queen. Valuation ...
At the most basic level, White's third move attacks the knight that defends the e5-pawn from the attack by the f3-knight. White's apparent threat to win Black's e-pawn with 4.Bxc6 dxc6 5.Nxe5 is illusory—Black can respond 5...Qd4, forking the knight and e4-pawn, winning back the material with a good position. [ 7 ]
Black gains the half-open b-file, but the central pawn structure becomes awkward. The queen bishop has a particularly hard time finding a square, since moving the d-pawn leaves the c6-pawn undefended. If 5.Nxe5, Black regains the pawn with 5...Qg5 6.Nf3 Qxg2 7.Rg1 Qh3; White has lost the right to castle kingside but has a lead in development ...
Consequently, a knight alternates between light and dark squares with each move. [2] When moving, the knight can jump over pieces to reach its destination. [a] [b] [4] Knights capture in the same way, replacing the enemy piece on the square and removing it from the board. A knight can have up to eight available moves at once.
The Four Knights Game is a chess opening that begins with the moves: . 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6. This is the most common sequence, but the knights may develop in any order to reach the same position.
has a knight ready to jump into the e5-square which the IQP supports. This can be a jumping-off point for an attack. has two pieces controlling the weak d5-square in front of the IQP (queen's knight and light-squared bishop). has three pieces preparing the thematic d4–d5 advance (queen's knight, light-squared bishop, and queen).
The second one, first seen in 2008 in a game between Topalov and Kramnik, is the flashy 12.Nxf7 (a full piece sacrifice), which leads to a wild attack after 12...Kxf7 13.e5 Nd5 14.Ne4 Ke7 15.Nd6 Qb6 16.Bg4 and White has a great position, strong knight on d6, control over the center and the light squares, and pressure against the weak e6 pawn.