searchctl

type Handle interface {
	// Halt halts the search, if running. Idempotent.
	Halt() search.PV
}

type Iterative struct {
	Root search.Search
}

type Launcher interface {
	// Launch a new search from the given position. It expects an exclusive (forked) board and
	// returns a PV channel for iteratively deeper searches. If the search is exhausted, the
	// channel is closed. The search can be stopped at any time.
	Launch(ctx context.Context, b *board.Board, tt search.TranspositionTable, noise eval.Random, opt Options) (Handle, <-chan search.PV)
}

type Options struct {
	// DepthLimit, if set, limits the search to the given ply depth. Zero means no limit.
	DepthLimit lang.Optional[uint]
	// TimeControl, if set, limits the search to the given time parameters.
	TimeControl lang.Optional[TimeControl]
}

type TimeControl struct {
	White, Black time.Duration
	Moves        int // 0 == rest of game
}