game

type Colour int32

type Coord struct {
	X, Y int16
}

type CoordConverter interface {
	Ltoi(Coord) Single
	Itol(Single) Coord
}

type Coordinate interface {
	IsResignation() bool
	IsPass() bool
}

type GifEncoder struct {
	H, W int
	font.Drawer

	io.Writer
	// contains filtered or unexported fields
}

type KomiSetter interface {
	State
	SetKomi(komi float64) error
}

type MetaState interface {
	Name() string // name of the game
	Epoch() int
	GameNumber() int
	Score(a Player) float64
	State() State
}

type Player Colour

type PlayerMove struct {
	Player
	Single
}

type Single int32

type State interface {
	// These methods represent the game state
	BoardSize() (int, int) // returns the board size
	Board() []Colour       // returns the board state
	ActionSpace() int      // returns the number of permissible actions
	Hash() Zobrist         // returns the hash of the board
	ToMove() Player        // returns the next player to move (terminology is a bit confusing - this means the current player)
	Passes() int           // returns number of passes that have been made
	MoveNumber() int       // returns count of moves so far that led to this point.
	LastMove() PlayerMove  // returns the last move that was made
	Handicap() int         // returns a handicap (i.e. allow N moves)

	// Meta-game stuff
	Score(p Player) float32             // score of the given player
	AdditionalScore() float32           // additional tie breaking scores (like komi etc)
	Ended() (ended bool, winner Player) // has the game ended? if yes, then who's the winner?

	// interactions
	SetToMove(Player)         // set the next player to move
	Check(m PlayerMove) bool  // check if the placement is legal
	Apply(m PlayerMove) State // should return a GameState. The required side effect is the NextToMove has to change.
	Reset()                   // reset state

	// For MCTS
	Historical(i int) []Colour // returns the board state from history
	UndoLastMove()
	Fwd()

	// generics
	Eq(other State) bool
	Clone() State
}

type Zobrist uint32