Class: Games_Chess_Standard

Source Location: /Games_Chess-0.7.0/Chess/Standard.php

Class Overview

Games_Chess
   |
   --Games_Chess_Standard

Standard chess game

Author(s):

Gregory Beaver <cellog at php.net>

Methods

Child classes:

Games_Chess_Losers: Losers chess game

Inherited Variables

Inherited Methods

Class: Games_Chess

Games_Chess::addPiece(): Add a piece to the chessboard
Games_Chess::blankBoard(): Create a blank chessboard with no pieces on it
Games_Chess::canCastleKingside(): Determine legality of kingside castling
Games_Chess::canCastleQueenside(): Determine legality of queenside castling
Games_Chess::commitTransaction(): Remove any possibility of undo.
Games_Chess::gameOver()
Games_Chess::getDiagonalColor()
Games_Chess::getMessage(): Get an error message from the code
Games_Chess::getMoveList(): Get the list of moves in Standard Algebraic Notation
Games_Chess::getPieceLocations(): Get the location of all pieces on the board of a certain color
Games_Chess::getPossibleBishopMoves(): Get all legal Bishop moves (checking of the king is not taken into account)
Games_Chess::getPossibleKingMoves(): Get all legal King moves (checking of the king is not taken into account)
Games_Chess::getPossibleKnightMoves(): Get all legal Knight moves (checking of the king is not taken into account)
Games_Chess::getPossibleMoves(): Get a list of all possible theoretical squares a piece of this nature and color could move to with the current board and game setup.
Games_Chess::getPossiblePawnMoves(): Get all legal Pawn moves (checking of the king is not taken into account)
Games_Chess::getPossibleQueenMoves(): Get all legal Queen moves (checking of the king is not taken into account)
Games_Chess::getPossibleRookMoves(): Get all legal Rook moves (checking of the king is not taken into account)
Games_Chess::in50MoveDraw(): Determine whether any pawn move or capture has occurred in the past 50 moves
Games_Chess::inBasicDraw(): Determine the presence of a basic draw as defined by FIDE rules
Games_Chess::inCheckMate(): Determine whether a side is in checkmate
Games_Chess::inDraw(): Determines the presence of a forced draw
Games_Chess::inRepetitionDraw(): Determine whether draw by repetition has happened
Games_Chess::inStaleMate(): Determine whether a side is in stalemate
Games_Chess::isError(): Determines whether the data returned from a method is a PEAR-related
Games_Chess::isPromoteMove(): Determine whether moving a piece from one square to another requires
Games_Chess::moveSAN(): Make a move from a Standard Algebraic Notation (SAN) format
Games_Chess::moveSquare(): Move a piece from one square to another, and mark the old square as empty
Games_Chess::raiseError()
Games_Chess::renderFen(): render the FEN notation for the current board
Games_Chess::resetGame(): Create a new game with the starting position, or from the position specified by $fen
Games_Chess::rollbackTransaction(): Undo any changes to state since startTransaction() was first used
Games_Chess::startTransaction(): Begin a chess piece transaction
Games_Chess::toArray(): Generate a representation of the chess board and pieces for use as a direct translation to a visual chess board
Games_Chess::toMove()
Games_Chess::_convertSquareToSAN(): Convert a starting and ending algebraic square into SAN
Games_Chess::_getAllPieceLocations(): Get the location of every piece on the board of color $color
Games_Chess::_getCastleSquares(): Get a list of all the squares a king could castle to on an empty board
Games_Chess::_getDiagonalColor(): Return the color of a square (black or white)
Games_Chess::_getKingSquares(): Get a list of all the squares a king could move to on an empty board
Games_Chess::_getKnightSquares(): Get all the squares a knight could move to on an empty board
Games_Chess::_getQueenSquares(): Get all the squares a queen could go to on a blank board
Games_Chess::_getRookSquares(): Get the set of squares that are diagonals from this square on an empty board.
Games_Chess::_moveAlgebraic(): Move a piece from one square to another, and mark the old square as empty
Games_Chess::_parseMove(): Parse out the segments of a move (minus any annotations)
Games_Chess::_setupStartingPosition(): Set up the board with the starting position
Games_Chess::_validMove(): Validate a move

Class Details

[line 35]
Standard chess game

Author: Gregory Beaver <cellog@php.net>

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Method Detail

addPiece [line 163]

true|PEAR_Error addPiece(
W|B
$color, K|Q|R|N|P|B
$type, string
$square)

Add a piece to the chessboard

Throws: GAMES_CHESS_ERROR_INVALIDSQUARE
Throws: GAMES_CHESS_ERROR_DUPESQUARE
Throws: GAMES_CHESS_ERROR_MULTIPIECE

Overrides Games_Chess::addPiece() (Add a piece to the chessboard)

Parameters:

W\|B	`$color`	—	piece color
K\|Q\|R\|N\|P\|B	`$type`	—	Piece type
string	`$square`	—	[a-h][1-8] algebraic location of piece

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blankBoard [line 46]

void blankBoard(
)

Set up a blank chess board

Overrides Games_Chess::blankBoard() (Create a blank chessboard with no pieces on it)

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inCheck [line 404]

string|array|false inCheck(
W|B
$color)

Determine whether one side's king is in check by the other side's pieces

Return: square of checking piece(s) or false

Parameters:

W|B $color — color of pieces to determine enemy check

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isBishop [line 780]

boolean isBishop(
string
$piecename)

Determine whether a piece name is a bishop

This does NOT take an algebraic square as the argument, but the contents of _board[algebraic square]

Access: protected

Parameters:

string $piecename —

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isKing [line 827]

boolean isKing(
string
$piecename)

Determine whether a piece name is a king

This does NOT take an algebraic square as the argument, but the contents of _board[algebraic square]

Access: protected

Parameters:

string $piecename —

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isPawn [line 812]

boolean isPawn(
string
$piecename)

Determine whether a piece name is a pawn

This does NOT take an algebraic square as the argument, but the contents of _board[algebraic square]

Access: protected

Parameters:

string $piecename —

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isRook [line 796]

boolean isRook(
string
$piecename)

Determine whether a piece name is a rook

This does NOT take an algebraic square as the argument, but the contents of _board[algebraic square]

Access: protected

Parameters:

string $piecename —

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toArray [line 255]

array toArray(
)

Generate a representation of the chess board and pieces for use as a

direct translation to a visual chess board

Overrides Games_Chess::toArray() (Generate a representation of the chess board and pieces for use as a direct translation to a visual chess board)

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_getAllPieceLocations [line 359]

void _getAllPieceLocations(
W|B
$color)

Get the location of every piece on the board of color $color

Access: protected

Overrides Games_Chess::_getAllPieceLocations() (Get the location of every piece on the board of color $color)

Parameters:

W|B $color — color of pieces to check

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_getAllPieceSquares [line 493]

array _getAllPieceSquares(
K|B|N|R|W|P
$piece, W|B
$color, [string
$exclude = null])

Retrieve the locations of all pieces of the same type as $piece

Access: protected

Parameters:

K\|B\|N\|R\|W\|P	`$piece`	—
W\|B	`$color`	—
string	`$exclude`	—	[a-h][1-8] optional square of piece to exclude from the listing

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_getColor [line 873]

void _getColor(

$name)

Retrieve the color of a piece from its name

Game-specific method of retrieving the color of a piece

Access: protected

Parameters:

$name —

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_getKing [line 714]

false|string _getKing(
[
$color = null])

Get the location of the king

assumes valid color input

Access: protected

Parameters:

$color —

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_getPiece [line 732]

string|array _getPiece(
string
$piecename)

Get the location of a piece

This does NOT take an algebraic square as the argument, but the contents of _board[algebraic square]

Access: protected

Parameters:

string $piecename —

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_getPieceTypes [line 897]

array _getPieceTypes(
)

Get a list of all pieces on the board organized by the type of piece, and the color of the square the piece is on.

Used to determine basic draw conditions

Return:

Format:

 array(
   // white pieces
   'W' => array('B' => array('W', 'B'), // all bishops
                'K' => array('W'),...
               ),
   // black pieces
   'B' => array('Q' => array('B'), // all queens
                'K' => array('W'),... // king is on white square

Access: protected

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_getPossibleChecks [line 381]

array _getPossibleChecks(
W|B
$color)

Used to determine check

Retrieve all of the moves of the pieces matching the color passed in.

Access: protected

Parameters:

W|B $color —

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_isKnight [line 748]

boolean _isKnight(
string
$piecename)

Determine whether a piece name is a knight

This does NOT take an algebraic square as the argument, but the contents of _board[algebraic square]

Access: protected

Parameters:

string $piecename —

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_isQueen [line 764]

boolean _isQueen(
string
$piecename)

Determine whether a piece name is a queen

This does NOT take an algebraic square as the argument, but the contents of _board[algebraic square]

Access: protected

Parameters:

string $piecename —

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_renderFen [line 311]

string _renderFen(
)

Render the current board position into Farnsworth-Edwards Notation

This method only renders the board contents, not the castling and other information

Access: protected

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_setupStartingPosition [line 93]

void _setupStartingPosition(
)

Set up a starting position for a new chess game

Access: protected

Overrides Games_Chess::_setupStartingPosition() (Set up the board with the starting position)

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_squareToPiece [line 468]

false|array _squareToPiece(
string
$square)

Translate an algebraic coordinate into the color and name of a piece,

or false if no piece is on that square

Return: Format array('color' => B|W, 'piece' => P|R|Q|N|K|B)
Access: protected

Parameters:

string $square — [a-h][1-8]

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_takePiece [line 429]

void _takePiece(
string
$piece)

Mark a piece as having been taken. No validation is performed

Access: protected

Parameters:

string $piece — [a-h][1-8]

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