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Chessopedia: Online Chess Encylopedia


  • Fool's Mate

    • 2211 Reads
    • | 2211 Reads

    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 — White might p... Read More »

  • Ruy Lopez

    • 1773 Reads
    • | 1773 Reads

    Opening: Ruy Lopez (Spanish)ECO: C60ECO Variations: C60 - C99Type: King's Pawn GamePGN: 1. e4 e5 2. Nf3 Nc6 3.Bb5FEN:  r1bqkbnr/pppp1ppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq - 3 3 The Ruy Lopez (also known as the Spanish Opening) is a ches... Read More »

  • Scandinavian Defense

    • 1561 Reads
    • | 1561 Reads

    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 Scandi... Read More »

  • Mathematics and chess

    • 1109 Reads
    • | 1109 Reads

    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

    • 823 Reads
    • | 823 Reads

    En passant (from French: "in passing") is a maneuver in chess which is performed after a player moves a pawn two squares forward from its starting position, and an opposing pawn captures it as if it had only moved one square. En passant may only... Read More »

  • The English Opening

    • 647 Reads
    • | 647 Reads

    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

    • 635 Reads
    • | 635 Reads

    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

    • 552 Reads
    • | 552 Reads

    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

    • 462 Reads
    • | 462 Reads

    Pronounced "tsoog-tsvung", Zugzwang is 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 ... Read More »

  • Chess

    • 341 Reads
    • | 341 Reads

    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 but ... Read More »