A board for Losing Chess, LC1 (main variant, international rules) a.k.a Antichess. More...

#include <antiboard.h>

Inheritance diagram for Chess::AntiBoard:

Public Member Functions
	AntiBoard ()

virtual Board *	copy () const

virtual QString	defaultFenString () const

virtual Result	result ()

virtual QString	variant () const

Public Member Functions inherited from Chess::StandardBoard
virtual Board *	copy () const

virtual QString	defaultFenString () const

	StandardBoard ()

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

virtual QString	variant () const

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

virtual Result	result ()

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

virtual Board *	copy () const =0

virtual QString	defaultFenString () const =0

QString	fenString (FenNotation notation=XFen) const

GenericMove	genericMove (const Move &move) const

virtual int	height () const =0

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 ()

virtual Result	result ()=0

virtual int	reversibleMoveCount () const

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 QString	variant () const =0

virtual bool	variantHasDrops () const

virtual bool	variantHasWallSquares () const

virtual int	width () const =0

virtual	~Board ()

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

virtual bool	hasCastling () const

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

virtual bool	kingsCountAssertion (int whiteKings, int blackKings) const

virtual bool	vIsLegalMove (const Move &move)

virtual Result	vResultOfStalemate () const

virtual bool	vSetFenString (const QStringList &fen)

Protected Member Functions inherited from Chess::WesternBoard
virtual void	addPromotions (int sourceSquare, int targetSquare, QVarLengthArray< Move > &moves) const

virtual int	captureType (const Move &move) const

virtual int	castlingFile (CastlingSide castlingSide) const

int	enpassantSquare () const

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

virtual bool	hasCastling () const

bool	hasCastlingRight (Side side, CastlingSide castlingSide) const

virtual bool	hasEnPassantCaptures () const

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

virtual bool	pawnHasDoubleStep () 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 void	vInitialize ()

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 ()

virtual int	captureType (const Move &move) const

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

virtual void	generateMovesForPiece (QVarLengthArray< Move > &moves, int pieceType, int square) const =0

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

virtual bool	isLegalPosition ()=0

virtual QString	lanMoveString (const Move &move)

const Move &	lastMove () const

virtual int	maxPieceSymbolLength () const

bool	moveExists (const Move &move) const

virtual Move	moveFromLanString (const QString &str)

virtual Move	moveFromSanString (const QString &str)=0

Piece	pieceAt (int square) const

bool	pieceHasMovement (int pieceType, unsigned movement) const

void	removeFromReserve (const Piece &piece)

virtual int	reserveType (int pieceType) const

virtual QString	sanMoveString (const Move &move)=0

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

virtual QString	vFenString (FenNotation notation) const =0

virtual void	vInitialize ()=0

virtual bool	vIsLegalMove (const Move &move)

virtual void	vMakeMove (const Move &move, BoardTransition *transition)=0

virtual bool	vSetFenString (const QStringList &fen)=0

virtual void	vUndoMove (const Move &move)=0

void	xorKey (quint64 key)

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

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

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

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

static const unsigned	KnightMovement = 2

static const unsigned	RookMovement = 8

Detailed Description

A board for Losing Chess, LC1 (main variant, international rules) a.k.a Antichess.

Losing Chess is a variant of standard chess but has a different aim.

The side that has no legal moves wins, either by losing all pieces or by being stalemated.

The king has no royal powers, so there is no check and the king can be captured. Pawns can also promote to king. Castling is not allowed. If a side can capture then they must make a capture move.

Note: Rules: https://en.wikipedia.org/wiki/Losing_chess#Rules_.28main_variant.29

Losing Chess is believed to be several centuries old. Giveaway Chess and Suicide Chess are variants of Losing Chess.

See also: GiveawayBoard; SuicideBoard

AntiBoard uses Polyglot-compatible zobrist position keys, so adequate opening books in Polyglot format can be used.

Note: Standard Chess Rules: http://www.fide.com/component/handbook/?id=124&view=article

See also: PolyglotBook

Constructor & Destructor Documentation

◆ AntiBoard()

Chess::AntiBoard::AntiBoard ( )

Creates a new AntiBoard object.

Member Function Documentation

◆ addPromotions()

void Chess::AntiBoard::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::CodrusBoard.

◆ copy()

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

virtual

Creates and returns a deep copy of this board.

Reimplemented from Chess::StandardBoard.

Reimplemented in Chess::CodrusBoard, Chess::GiveawayBoard, and Chess::SuicideBoard.

◆ defaultFenString()

QString Chess::AntiBoard::defaultFenString ( ) const

virtual

Returns the variant's default starting FEN string.

Reimplemented from Chess::StandardBoard.

Reimplemented in Chess::GiveawayBoard.

◆ hasCastling()

bool Chess::AntiBoard::hasCastling ( ) const

protectedvirtual

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

See also: ShatranjBoard

Reimplemented from Chess::WesternBoard.

Reimplemented in Chess::GiveawayBoard.

◆ inCheck()

bool Chess::AntiBoard::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.

◆ kingsCountAssertion()

bool Chess::AntiBoard::kingsCountAssertion	(	int	whiteKings,
		int	blackKings
	)		const

protectedvirtual

Returns true if both counts of kings given by whiteKings and blackKings are correct. WesternBoard expects exactly one king per side.

See also: AntiBoard; HordeBoard

Reimplemented from Chess::WesternBoard.

Reimplemented in Chess::CodrusBoard.

◆ result()

Result Chess::AntiBoard::result ( )

virtual

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

Reimplemented from Chess::WesternBoard.

Reimplemented in Chess::CodrusBoard.

◆ variant()

QString Chess::AntiBoard::variant ( ) const

virtual

Returns the name of the chess variant.

Reimplemented from Chess::StandardBoard.

Reimplemented in Chess::CodrusBoard, Chess::GiveawayBoard, and Chess::SuicideBoard.

◆ vIsLegalMove()

bool Chess::AntiBoard::vIsLegalMove ( const Move & move )

protectedvirtual

Returns true if move is a legal move.

This function is called by isLegalMove() after making sure that there is a pseudo-legal move same as move. This function shouldn't check for the existence of move by generating moves.

The default implementation only checks if the position after move is legal.

Reimplemented from Chess::WesternBoard.

Reimplemented in Chess::CodrusBoard.

◆ vResultOfStalemate()

Result Chess::AntiBoard::vResultOfStalemate ( ) const

protectedvirtual

Rules stalemate outcome.

Reimplemented in Chess::CodrusBoard, and Chess::SuicideBoard.

◆ vSetFenString()

bool Chess::AntiBoard::vSetFenString ( const QStringList & fen )

protectedvirtual

Sets the board according to a FEN string.

This function is called by setFenString(). The board state, side to move and hand pieces are handled by the base class. This function reads the rest of the string, if any.

Reimplemented from Chess::WesternBoard.

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

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

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ AntiBoard()

Member Function Documentation

◆ addPromotions()

◆ copy()

◆ defaultFenString()

◆ hasCastling()

◆ inCheck()

◆ kingsCountAssertion()

◆ result()

◆ variant()

◆ vIsLegalMove()

◆ vResultOfStalemate()

◆ vSetFenString()