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Chessopedia - The Online Chess Encylopedia

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Fool's Mate

Fools mate   Fool's mate, also known as the "two-move checkmate," is the quickest possible checkmate in the game of chess. One example consists of the moves leading to the position shown... There are eight slight variations on the pattern — ... Read more »

Ruy Lopez

The Ruy Lopez (also known as the Spanish Opening) is a chess opening beginning with the moves 1.e4 e5 2.Nf3 Nc6 3.Bb5. While this opening was first noted in the Gottingen Manuscript around 1490, it is named after Ruy López de Segura, a 16th cent... Read more »

Scandinavian Defense

The Scandinavian Defense (also known as the Center Counter) is the chess opening characterized by the first moves 1.e4 d5. At first characterized as a beginner's move, it has recently been revived, with several GM's trying it. Although the Scand... Read more »

Mathematics and chess

The number of possible chess positions after White’s first ply move is 20 (16 pawn moves and 4 knight moves).  There are 400 possible chess positions after two ply moves (first ply move for White followed by first ply move for Black).  Th... Read more »

En passant

En passant (from French: "in [the pawn's] passing") is a maneuver in chess when a player moves a pawn two squares forward from its starting position, and an opposing pawn could have captured it if it had only moved one square forward. The En passa... Read more »

The English Opening

This Chess opening involves the first move c4, (called The English Opening because a group of English players in around the 1890's often played it, including Howard Staunton), it is played as one of the main opening choices for white- an alternati... Read more »

King's Gambit

The King's Gambit is a chess opening characterised by very lively and aggresive play which is the case for most gambits. It has been very popular in the 19th century, the era of romatic chess, where attacking chess was at his peak. Nowdays it is... Read more »

Abbazia Defense

A King's Gambit Accepted variation (1.e4 e5 2.f4 exf4 3.Nf3 d5) (ECO classification - C36).  The name comes from a tournament, Abbazia 1912, in which all the games had to be a King's Gambit Accepted.  The event was won by Rudolf Spielmann,  Ab... Read more »

Zugzwang

A German word meaning obligation to move.  The term is used for a position in which whoever has the move would obtain a worse result than if it were the opponent’s turn to play.  The term was first used in a German chess magazine in 1858. Bel... Read more »

Chess

Chess is a game played between two players using 32 pieces (16 each of two distinct colors) on a 64 square board. The earliest known ancestor of modern chess was an Indian game called Chaturanga, where the knight, King and Rooks moved the same bu... Read more »

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