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What is a Double Attack or Fork?
A double attack occurs when a single move creates two simultaneous threats to enemy pieces, usually of high value. It is one of the most effective tactical motifs in chess, as it forces the opponent to choose which threat to defend against, increasing the chances of winning material.
Key Features
- Involves one piece creating two threats at the same time.
- The opponent usually cannot defend both threats with a single move.
- Can involve checks, captures of important pieces, or attacks on multiple strategic targets.
- Very effective for winning material or forcing errors in the opponent's defense.
Double Attack Example
Scenario: White moves and creates a double attack.
The black king is on e8, the black rook on a8, and the white knight on b5. Moving the white knight to c7 creates a double attack: the knight threatens the rook and the king at the same time (check).
Move: 1. Nc7+!
By moving the knight to c7, it simultaneously threatens the rook and gives check. Black can only respond to one of the threats, losing material in the other.