Laws of Chess - The moves of the pieces
It is not permitted to move a piece to a square occupied by a piece of the same colour. If a piece moves to a square occupied by an opponent´s piece the latter is captured and removed from the chessboard as part of the same move. A piece is said to attack an opponent´s piece if the piece could make a capture on that square according to Articles 2. to 5..
a) The queen may move to any square along the file, the rank or a diagonal on which it stands.
b) The rook may move to any square along the file or the rank on which it stands.
c) The bishop may move to any square along a diagonal on which it stands.
When making these moves the bishop, rook or queen may not move over any intervening pieces.
The knight may move to one of the squares nearest to that on which it stands but not on the same rank, file or diagonal.
a) The pawn may move forward to the unoccupied square immediately in front of it on the same file, or
b) on its first move the pawn may move as in a); alternatively it may advance two squares along the same file provided both squares are unoccupied, or
c) the pawn may move to a square occupied by an opponent´s piece, which is diagonally in front of it on an adjacent file, capturing that piece.
d) A pawn
attacking a square crossed by an opponent´s pawn which has advanced
two squares in one move from its original square may capture this opponent´s
pawn as though the latter had been moved only one square. This capture
may only be made on the move following this advance and is called an 'en
This is a move of the king and either rook of the same colour on the same
rank, counting as a single move of the king and executed as follows: the
king is transferred from its original square two squares towards the rook,
then that rook is transferred to the square the king has just crossed.
is prevented temporarily
b) The person suggesting is bound to the conditional series of moves until the opponent deviates from the suggested series of moves.
accepting a series of conditional moves, all the moves accepted need to
be repeated (This can be done by clicking the arrow button on the right
of the chessboard. By clicking "move" -> "Yes", the conditional moves
will be saved up to the position that was chosen).