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  2. Threefold repetition - Wikipedia

    en.wikipedia.org/wiki/Threefold_repetition

    The rule is also known as repetition of position and, in the USCF rules, as triple occurrence of position. [1] Two positions are by definition "the same" if the same types of pieces occupy the same squares, the same player has the move, the remaining castling rights are the same and the possibility to capture en passant is the same.

  3. Perpetual check - Wikipedia

    en.wikipedia.org/wiki/Perpetual_check

    In the game of chess, perpetual check is a situation in which one player can play an unending series of checks, from which the defending player cannot escape.This typically arises when the player who is checking feels their position in the game is inferior, they cannot deliver checkmate, and wish to force a draw.

  4. List of chess variants - Wikipedia

    en.wikipedia.org/wiki/List_of_chess_variants

    No Stress Chess: Marketed for teaching beginners, the piece(s) a player is able to move are determined by drawing from a deck of cards, with each card providing the rules for how the piece may move. Castling and en passant are disallowed. [105] Panic Chess: Player selects a piece to move, but the target square is randomized from all possible ...

  5. Berlin Defence - Wikipedia

    en.wikipedia.org/wiki/Berlin_Defence

    The Berlin Defence is a chess opening that begins with the moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6. The opening is a variation of the Ruy Lopez and is assigned codes C65–C67 in the Encyclopaedia of Chess Openings. [1] The code C65 covers White moves other than 4.0-0, such as 4.d3 (4.Nc3 is considered a variation of the Four Knights Game). The ...

  6. Glossary of chess problems - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_chess_problems

    A piece in a chess problem that is legally placed and could only have been created through promotion. It does not include pieces promoted after the initial problem position. orthochess Synonym for orthodox chess. [5] orthodox chess Chess according to FIDE's The Official Laws of Chess; [6] see Rules of chess.

  7. Discovered attack - Wikipedia

    en.wikipedia.org/wiki/Discovered_attack

    The diagram illustrates a trap in the Advance Variation of the French Defence, based on a discovered attack.If, after 1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Bd3 cxd4 7.cxd4, Black mistakenly attempts to win White's d-pawn with 7...Nxd4?? 8.Nxd4 Qxd4 (diagram), White can play 9.Bb5+, a discovered attack (White's bishop gets out of the way of White's queen) against Black's queen with check.

  8. Windmill (chess) - Wikipedia

    en.wikipedia.org/wiki/Windmill_(chess)

    In chess, a windmill (or seesaw) [1] [2] is a tactic in which a piece repeatedly gains material while simultaneously creating an inescapable series of alternating direct and discovered checks. Because the opponent must attend to check every move, they are unable to prevent their pieces from being captured; thus, windmills can be extremely powerful.

  9. Three-check chess - Wikipedia

    en.wikipedia.org/wiki/Three-check_chess

    Three-check chess, also simply known as three-check, is a chess variant where a player can win by placing their opponent in check three times. Apart from this, standard rules of chess apply, including starting position and other ending conditions, such as stalemate and checkmate .

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