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  2. En passant - Wikipedia

    en.wikipedia.org/wiki/En_passant

    The en passant capture is the only capturing move in chess where the capturing piece moves to a square not occupied by the captured piece. [ 6 ] : 463 Because many casual players are unfamiliar with or misunderstand the en passant rule, administrators on internet chess sites frequently receive erroneous complaints of bugs, cheating or hacking.

  3. Pawn (chess) - Wikipedia

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

    The capturing pawn moves to the square over which the moved pawn passed, and the moved pawn is removed from the board. The option to capture the moved pawn en passant must be exercised on the move immediately following the double-step pawn advance, or it is lost for the remainder of the game. The en passant capture is the only capture in chess ...

  4. Marseillais chess - Wikipedia

    en.wikipedia.org/wiki/Marseillais_chess

    It is not allowed to move the king into check on the first move of a turn and then move out of check on the second. En passant capture is allowed even if the opponent moved the corresponding pawn on the first move of their turn. Capturing en passant, however, must be done on the first move of the turn

  5. Rules of chess - Wikipedia

    en.wikipedia.org/wiki/Rules_of_chess

    Pawns cannot move backwards. A pawn, unlike other pieces, captures differently from how it moves. A pawn can capture an enemy piece on either of the two squares diagonally in front of the pawn. It cannot move to those squares when vacant except when capturing en passant. The pawn is also involved in the two special moves en passant and ...

  6. Retrograde analysis - Wikipedia

    en.wikipedia.org/wiki/Retrograde_analysis

    In most chess problems, including retrograde analysis problems, castling is assumed to be legal unless it can be proved otherwise. An en passant capture, on the other hand, is permitted only if it can be proved that the last move was a double step of the pawn to be captured.

  7. Chess on a really big board - Wikipedia

    en.wikipedia.org/wiki/Chess_on_a_really_big_board

    Once it has moved for the first time, it can only make one step at a time. (In the case of an 8×8 board, this is exactly the same as in standard chess). Such a long initial pawn move allows the moving pawn to be captured en passant by an enemy pawn as if it had stopped on any one of the squares it had passed through.

  8. Threefold repetition - Wikipedia

    en.wikipedia.org/wiki/Threefold_repetition

    (3) the possible moves of all the pieces are the same. Under (3) above, positions are not considered to be the same if: (a) in the first position, a pawn could have been captured en passant (by the en passant rule, in the subsequent positions, the pawn cannot be captured en passant anymore), or

  9. French Defence - Wikipedia

    en.wikipedia.org/wiki/French_Defence

    White may also choose to preserve his pawn on e5 by playing 4.e5 Nfd7 5.c3 c5 6.f4 Nc6 7.Ndf3, but his development is slowed as a result, and Black will gain dynamic chances if he can open the position to advantage. 3...Nc6 is known as the Guimard Variation: after 4.Ngf3 Nf6 5.e5 Nd7 Black will exchange White's cramping e-pawn next move by ...