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	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 (const QString &str) const
Square	chessSquare (int index) 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 QString &str) const
int	squareIndex (const Square &square) const
QString	squareString (const Square &square) const
QString	squareString (int index) 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

◆ ShatranjPieceType

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

◆ ShatranjBoard()

Chess::ShatranjBoard::ShatranjBoard ( )

Creates a new ShatranjBoard object.

Member Function Documentation

◆ addPromotions()

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::AseanBoard, and Chess::SittuyinBoard.

◆ canBareOpponentKing()

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.

◆ copy()

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

virtual

Creates and returns a deep copy of this board.

Implements Chess::Board.

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

◆ defaultFenString()

QString Chess::ShatranjBoard::defaultFenString ( ) const

virtual

Returns the variant's default starting FEN string.

Implements Chess::Board.

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

◆ generateMovesForPiece()

void Chess::ShatranjBoard::generateMovesForPiece	(	QVarLengthArray< Move > &	moves,
		int	pieceType,
		int	square ) const

protectedvirtual

Generates pseudo-legal moves for a piece of pieceType at square square.

Note: It doesn't matter if square doesn't contain a piece of pieceType, the move generator ignores it.

Reimplemented from Chess::WesternBoard.

Reimplemented in Chess::CourierBoard, Chess::MakrukBoard, Chess::OukBoard, and Chess::SittuyinBoard.

◆ hasCastling()

bool Chess::ShatranjBoard::hasCastling ( ) const

protectedvirtual

Returns true if castling is allowed. The default value is true.

See also: ShatranjBoard

Reimplemented from Chess::WesternBoard.

◆ inCheck()

bool Chess::ShatranjBoard::inCheck	(	Side	side,
		int	square = 0 ) const

protectedvirtual

Returns true if side is under attack at square. If square is 0, then the king square is used.

Reimplemented from Chess::WesternBoard.

Reimplemented in Chess::CourierBoard, Chess::MakrukBoard, and Chess::OukBoard.

◆ pawnHasDoubleStep()

bool Chess::ShatranjBoard::pawnHasDoubleStep ( ) const

protectedvirtual

Returns true if pawns have an initial double step option. The default value is true.

See also: ShatranjBoard

Reimplemented from Chess::WesternBoard.

◆ result()

Result Chess::ShatranjBoard::result ( )

virtual

Returns the result of the game, or Result::NoResult if the game is in progress.

Reimplemented from Chess::WesternBoard.

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

◆ variant()

QString Chess::ShatranjBoard::variant ( ) const

virtual

Returns the name of the chess variant.

Implements Chess::Board.

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

◆ vInitialize()

void Chess::ShatranjBoard::vInitialize ( )

protectedvirtual

Initializes the variant.

This function is called by initialize(). Subclasses shouldn't generally call it by themselves.

Reimplemented from Chess::WesternBoard.

Reimplemented in Chess::CourierBoard, and Chess::MakrukBoard.

Member Data Documentation

◆ AlfilMovement

const unsigned Chess::ShatranjBoard::AlfilMovement = 32

staticprotected

Movement mask for Alfil moves.

◆ FerzMovement

const unsigned Chess::ShatranjBoard::FerzMovement = 16

staticprotected

Movement mask for Ferz moves.

The documentation for this class was generated from the following files:

projects/lib/src/board/shatranjboard.h
projects/lib/src/board/shatranjboard.cpp

Public Member Functions

Protected Types

Protected Member Functions

Static Protected Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ ShatranjPieceType

Constructor & Destructor Documentation

◆ ShatranjBoard()

Member Function Documentation

◆ addPromotions()

◆ canBareOpponentKing()

◆ copy()

◆ defaultFenString()

◆ generateMovesForPiece()

◆ hasCastling()

◆ inCheck()

◆ pawnHasDoubleStep()

◆ result()

◆ variant()

◆ vInitialize()

Member Data Documentation

◆ AlfilMovement

◆ FerzMovement