A board for Shatranj. More...

#include <shatranjboard.h>

Inheritance diagram for Chess::ShatranjBoard:

Public Member Functions
virtual Board *	copy () const

virtual QString	defaultFenString () const

virtual Result	result ()

	ShatranjBoard ()

virtual QString	variant () const

Public Member Functions inherited from Chess::WesternBoard
virtual int	height () const

virtual int	reversibleMoveCount () const

	WesternBoard (WesternZobrist *zobrist)

virtual int	width () const

Public Member Functions inherited from Chess::Board
	Board (Zobrist *zobrist)

virtual CoordinateSystem	coordinateSystem () const

QString	fenString (FenNotation notation=XFen) const

GenericMove	genericMove (const Move &move) const

void	initialize ()

bool	isLegalMove (const Move &move)

virtual bool	isRandomVariant () const

bool	isRepetition (const Move &move)

bool	isValidSquare (const Square &square) const

quint64	key () const

QVector< Move >	legalMoves ()

void	makeMove (const Move &move, BoardTransition *transition=nullptr)

Move	moveFromGenericMove (const GenericMove &move) const

Move	moveFromString (const QString &str)

QString	moveString (const Move &move, MoveNotation notation)

Piece	pieceAt (const Square &square) const

Piece	pieceFromSymbol (const QString &pieceSymbol) const

QStringList	pieceList (Side side) const

QString	pieceString (int pieceType) const

QString	pieceSymbol (Piece piece) const

int	plyCount () const

int	repeatCount () const

QString	representation (Piece piece) const

int	reserveCount (Piece piece) const

virtual QList< Piece >	reservePieceTypes () const

void	reset ()

bool	setFenString (const QString &fen)

Side	sideToMove () const

QString	startingFenString () const

Side	startingSide () const

virtual Result	tablebaseResult (unsigned int *dtm=nullptr) const

void	undoMove ()

virtual Side	upperCaseSide () const

virtual bool	variantHasDrops () const

virtual bool	variantHasOptionalPromotions () const

virtual bool	variantHasWallSquares () const

virtual	~Board ()

Protected Types
enum	ShatranjPieceType { Ferz = Queen, Alfil = Bishop }

Protected Types inherited from Chess::WesternBoard
enum	CastlingSide { QueenSide, KingSide, NoCastlingSide }

enum	StepType { NoStep = 0, FreeStep = 1, CaptureStep = 2 }

Protected Member Functions
virtual void	addPromotions (int sourceSquare, int targetSquare, QVarLengthArray< Move > &moves) const

virtual bool	canBareOpponentKing ()

virtual void	generateMovesForPiece (QVarLengthArray< Move > &moves, int pieceType, int square) const

virtual bool	hasCastling () const

virtual bool	inCheck (Side side, int square=0) const

virtual bool	pawnHasDoubleStep () const

virtual void	vInitialize ()

Protected Member Functions inherited from Chess::WesternBoard
virtual int	captureType (const Move &move) const

virtual int	castlingFile (CastlingSide castlingSide) const

int	enpassantSquare () const

bool	hasCastlingRight (Side side, CastlingSide castlingSide) const

virtual bool	hasEnPassantCaptures () const

virtual bool	isLegalPosition ()

virtual bool	kingCanCapture () const

virtual bool	kingsCountAssertion (int whiteKings, int blackKings) const

int	kingSquare (Side side) const

virtual QString	lanMoveString (const Move &move)

virtual Move	moveFromLanString (const QString &str)

virtual Move	moveFromSanString (const QString &str)

virtual bool	parseCastlingRights (QChar c)

int	pawnAmbiguity (StepType type=FreeStep) const

void	removeCastlingRights (int square)

void	removeCastlingRights (Side side)

virtual QString	sanMoveString (const Move &move)

virtual bool	variantHasChanneling (Side side, int square) const

virtual QString	vFenIncludeString (FenNotation notation) const

virtual QString	vFenString (FenNotation notation) const

virtual bool	vIsLegalMove (const Move &move)

virtual void	vMakeMove (const Move &move, BoardTransition *transition)

virtual bool	vSetFenString (const QStringList &fen)

virtual void	vUndoMove (const Move &move)

Protected Member Functions inherited from Chess::Board
void	addToReserve (const Piece &piece, int count=1)

int	arraySize () const

bool	canMove ()

Square	chessSquare (int index) const

Square	chessSquare (const QString &str) const

void	generateDropMoves (QVarLengthArray< Move > &moves, int pieceType) const

void	generateHoppingMoves (int sourceSquare, const QVarLengthArray< int > &offsets, QVarLengthArray< Move > &moves) const

void	generateMoves (QVarLengthArray< Move > &moves, int pieceType=Piece::NoPiece) const

void	generateSlidingMoves (int sourceSquare, const QVarLengthArray< int > &offsets, QVarLengthArray< Move > &moves) const

const Move &	lastMove () const

virtual int	maxPieceSymbolLength () const

bool	moveExists (const Move &move) const

Piece	pieceAt (int square) const

bool	pieceHasMovement (int pieceType, unsigned movement) const

void	removeFromReserve (const Piece &piece)

virtual int	reserveType (int pieceType) const

void	setPieceType (int type, const QString &name, const QString &symbol, unsigned movement=0, const QString &gsymbol=QString())

void	setSquare (int square, Piece piece)

int	squareIndex (const Square &square) const

int	squareIndex (const QString &str) const

QString	squareString (int index) const

QString	squareString (const Square &square) const

void	xorKey (quint64 key)

Static Protected Attributes
static const unsigned	AlfilMovement = 32

static const unsigned	FerzMovement = 16

Static Protected Attributes inherited from Chess::WesternBoard
static const unsigned	BishopMovement = 4

static const unsigned	KnightMovement = 2

static const unsigned	RookMovement = 8

Additional Inherited Members
Public Types inherited from Chess::WesternBoard
enum	WesternPieceType { Pawn = 1, Knight, Bishop, Rook, Queen, King }

Public Types inherited from Chess::Board
enum	CoordinateSystem { NormalCoordinates, InvertedCoordinates }

enum	FenNotation { XFen, ShredderFen }

enum	MoveNotation { StandardAlgebraic, LongAlgebraic }

Protected Attributes inherited from Chess::WesternBoard
QVarLengthArray< PawnStep, 8 >	m_pawnSteps

Detailed Description

A board for Shatranj.

Shatranj evolved from the Indian game Chaturanga and is the immediate ancestor of standard chess.

This game spread from India to Persia (named Chatrang, Shatrang) and then to Arabia as Shatranj. Shatranj rules, theory and problems (mansubat) are well documented. The game had stable rules and was popular for nine centuries in Arabia (about AD 650-1500). There were Arabian professional master players, player grades and handicap play.

Spanish and Italian players changed some rules of the game during the 15th and 16th century resulting in the much faster modern chess.

Focussing on the differences to standard chess:

Instead of the Queen Shatranj has the Ferz (Counselor) which only moves one square diagonally. There are no Bishops but Alfils (War Elephants), which leap two squares diagonally. The kings may start either on the d-file or e-file, facing each other. Shatranj has no pawn double steps and no castling. A Pawn can only promote to Ferz.

A side wins if their opponent cannot make a legal move (mate or stalemate), or has no pieces left besides their "bare" King. However a bare King is given one chance to get level by the next move: Two bare kings is a draw.

Note: Rules: http://en.wikipedia.org/wiki/Shatranj

Member Enumeration Documentation

enum Chess::ShatranjBoard::ShatranjPieceType

protected

Special piece types for Shatranj variants.

Enumerator
Ferz	Ferz (leaps 1 square diag.) overrides Queen. Alfil (leaps 2 squares diag.) overrides Bishop

Constructor & Destructor Documentation

Chess::ShatranjBoard::ShatranjBoard ( )

Creates a new ShatranjBoard object.

Member Function Documentation

void Chess::ShatranjBoard::addPromotions	(	int	sourceSquare,
		int	targetSquare,
		QVarLengthArray< Move > &	moves
	)		const

protectedvirtual

Adds pawn promotions to a move list.

This function is called when a pawn can promote by moving from sourceSquare to targetSquare. This function generates all the possible promotions and adds them to moves.

Reimplemented from Chess::WesternBoard.

Reimplemented in Chess::SittuyinBoard, and Chess::AseanBoard.

bool Chess::ShatranjBoard::canBareOpponentKing ( )

protectedvirtual

Returns true if the side to move can bare the opponent king with this move and the rules allow a counter bare king move else false.

Board * Chess::ShatranjBoard::copy ( ) const

virtual

Creates and returns a deep copy of this board.

Implements Chess::Board.

Reimplemented in Chess::KarOukBoard, Chess::MakrukBoard, Chess::SittuyinBoard, Chess::AseanBoard, Chess::CourierBoard, Chess::OukBoard, and Chess::AiWokBoard.