common

package
v1.55.0 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Jan 12, 2024 License: GPL-3.0 Imports: 7 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	FileAMask uint64 = 0x0101010101010101 << iota
	FileBMask
	FileCMask
	FileDMask
	FileEMask
	FileFMask
	FileGMask
	FileHMask
)
View Source 
const (
	Rank1Mask uint64 = 0xFF << (8 * iota)
	Rank2Mask
	Rank3Mask
	Rank4Mask
	Rank5Mask
	Rank6Mask
	Rank7Mask
	Rank8Mask
)
View Source 
const (
	FileA = iota
	FileB
	FileC
	FileD
	FileE
	FileF
	FileG
	FileH
)
View Source 
const (
	Rank1 = iota
	Rank2
	Rank3
	Rank4
	Rank5
	Rank6
	Rank7
	Rank8
)
View Source 
const (
	SquareA1 = iota
	SquareB1
	SquareC1
	SquareD1
	SquareE1
	SquareF1
	SquareG1
	SquareH1
	SquareA2
	SquareB2
	SquareC2
	SquareD2
	SquareE2
	SquareF2
	SquareG2
	SquareH2
	SquareA3
	SquareB3
	SquareC3
	SquareD3
	SquareE3
	SquareF3
	SquareG3
	SquareH3
	SquareA4
	SquareB4
	SquareC4
	SquareD4
	SquareE4
	SquareF4
	SquareG4
	SquareH4
	SquareA5
	SquareB5
	SquareC5
	SquareD5
	SquareE5
	SquareF5
	SquareG5
	SquareH5
	SquareA6
	SquareB6
	SquareC6
	SquareD6
	SquareE6
	SquareF6
	SquareG6
	SquareH6
	SquareA7
	SquareB7
	SquareC7
	SquareD7
	SquareE7
	SquareF7
	SquareG7
	SquareH7
	SquareA8
	SquareB8
	SquareC8
	SquareD8
	SquareE8
	SquareF8
	SquareG8
	SquareH8
)
View Source 
const (
	SQUARE_NB = 64
	RANK_NB   = 8
	FILE_NB   = 8
	COLOUR_NB = 2
	PIECE_NB  = 8
)
View Source 
const (
	SideWhite = 0
	SideBlack = 1
)
View Source 
const (
	WhiteKingSide = 1 << iota
	WhiteQueenSide
	BlackKingSide
	BlackQueenSide
)
View Source 
const (
	Empty int = iota
	Pawn
	Knight
	Bishop
	Rook
	Queen
	King
)
View Source 
const InitialPositionFen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
View Source 
const (
	MaxMoves = 256
)
View Source 
const MoveEmpty = Move(0)
View Source 
const SquareNone = -1

Variables

View Source 
var (
	SquareMask    [64]uint64
	KnightAttacks [64]uint64
	KingAttacks   [64]uint64
)
View Source 
var FileMask = [8]uint64{
	FileAMask, FileBMask, FileCMask, FileDMask, FileEMask, FileFMask, FileGMask, FileHMask,
}

Functions

func AbsDelta 

func AbsDelta(x, y int) int

func AllBlackPawnAttacks 

func AllBlackPawnAttacks(b uint64) uint64

func AllWhitePawnAttacks 

func AllWhitePawnAttacks(b uint64) uint64

func BishopAttacks 

func BishopAttacks(from int, occ uint64) uint64

https://www.chessprogramming.org/Magic_Bitboards

func BitboardString 

func BitboardString(b uint64) string

func Down 

func Down(b uint64) uint64

func DownFill 

func DownFill(gen uint64) uint64

func DownLeft 

func DownLeft(b uint64) uint64

func DownRight 

func DownRight(b uint64) uint64

func File 

func File(sq int) int

func FileDistance 

func FileDistance(sq1, sq2 int) int

func FileFill 

func FileFill(gen uint64) uint64

func FirstOne 

func FirstOne(b uint64) int

func FlipSquare 

func FlipSquare(sq int) int

func IsDarkSquare 

func IsDarkSquare(sq int) bool

func Left 

func Left(b uint64) uint64

func MakeSquare 

func MakeSquare(file, rank int) int

func Max 

func Max(l, r int) int

func Min 

func Min(l, r int) int

func MoreThanOne 

func MoreThanOne(value uint64) bool

func ParseSquare 

func ParseSquare(s string) int

func PawnAttacks 

func PawnAttacks(from int, side bool) uint64

func PawnAttacksNew 

func PawnAttacksNew(side, from int) uint64

func PopCount 

func PopCount(b uint64) int

func QueenAttacks 

func QueenAttacks(from int, occ uint64) uint64

func Rank 

func Rank(sq int) int

func RankDistance 

func RankDistance(sq1, sq2 int) int
func Right(b uint64) uint64

func RookAttacks 

func RookAttacks(from int, occ uint64) uint64

func SquareDistance 

func SquareDistance(sq1, sq2 int) int

func SquareName 

func SquareName(sq int) string

func Up 

func Up(b uint64) uint64

func UpFill 

func UpFill(gen uint64) uint64

func UpLeft 

func UpLeft(b uint64) uint64

func UpRight 

func UpRight(b uint64) uint64

Types

type LimitsType 

type LimitsType struct {
	Ponder         bool
	Infinite       bool
	WhiteTime      int
	BlackTime      int
	WhiteIncrement int
	BlackIncrement int
	MoveTime       int
	MovesToGo      int
	Depth          int
	Nodes          int
	Mate           int
}

type Move 

type Move int32

func ParseMoveSAN 

func ParseMoveSAN(pos *Position, san string) Move

func (Move) CapturedPiece 

func (m Move) CapturedPiece() int

func (Move) From 

func (m Move) From() int

func (Move) MovingPiece 

func (m Move) MovingPiece() int

func (Move) Promotion 

func (m Move) Promotion() int

func (Move) String 

func (m Move) String() string

func (Move) To 

func (m Move) To() int

type OrderedMove 

type OrderedMove struct {
	Move Move
	Key  int32
}

type Position 

type Position struct {
	Pawns, Knights, Bishops, Rooks, Queens, Kings, White, Black, Checkers uint64
	WhiteMove                                                             bool
	CastleRights, Rule50, EpSquare                                        int
	Key                                                                   uint64
	LastMove                                                              Move
}

func MirrorPosition 

func MirrorPosition(p *Position) Position

func NewPositionFromFEN 

func NewPositionFromFEN(fen string) (Position, error)

func (*Position) AllPieces 

func (p *Position) AllPieces() uint64

func (*Position) Colours 

func (p *Position) Colours(side int) uint64

func (*Position) GenerateCaptures 

func (p *Position) GenerateCaptures(ml []OrderedMove) []OrderedMove

func (*Position) GenerateLegalMoves 

func (p *Position) GenerateLegalMoves() []Move

func (*Position) GenerateMoves 

func (p *Position) GenerateMoves(ml []OrderedMove) []OrderedMove

func (*Position) GetPieceTypeAndSide 

func (p *Position) GetPieceTypeAndSide(sq int) (pieceType int, side bool)

func (*Position) IsCheck 

func (p *Position) IsCheck() bool

func (*Position) IsRepetition 

func (p *Position) IsRepetition(other *Position) bool

func (*Position) KingSq 

func (p *Position) KingSq(side bool) int

func (*Position) MakeMove 

func (src *Position) MakeMove(move Move, result *Position) bool

func (*Position) MakeMoveLAN 

func (p *Position) MakeMoveLAN(lan string) (Position, bool)

func (*Position) MakeNullMove 

func (src *Position) MakeNullMove(result *Position)

func (*Position) PiecesByColor 

func (p *Position) PiecesByColor(side bool) uint64

func (*Position) String 

func (p *Position) String() string

func (*Position) WhatPiece 

func (p *Position) WhatPiece(sq int) int

type SearchInfo 

type SearchInfo struct {
	Score    UciScore
	Depth    int
	Nodes    int64
	Time     time.Duration
	MainLine []Move
}

type SearchParams 

type SearchParams struct {
	Positions []Position
	Limits    LimitsType
	Progress  func(si SearchInfo)
}

type UciScore 

type UciScore struct {
	Centipawns int
	Mate       int
}

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.