attacks

type Attacks struct {

	// the position key for which the attacks have been calculated
	Zobrist position.Key
	// bitboards of attacked/defended squares for each color and each from square
	// to get attackers us &^ ownPieces or & ownPieces for defenders
	From [ColorLength][SqLength]Bitboard
	// bitboards of attackers/defenders for each color and to square
	// to get attackers us &^ ownPieces or & ownPieces for defenders
	To [ColorLength][SqLength]Bitboard
	// bitboards for all attacked/defended squares of a color
	// to get attackers us &^ ownPieces or & ownPieces for defenders
	All [ColorLength]Bitboard
	// bitboards of attacked/defended squares for each color and each piece type
	// to get attackers us &^ ownPieces or & ownPieces for defenders
	Piece [ColorLength][PtLength]Bitboard
	// sum of possible moves for each color (moves to ownPieces already excluded)
	Mobility [ColorLength]int
	// pawn attacks - squares attacked by pawn of the given color
	Pawns [ColorLength]Bitboard
	// pawn double - squares which are attacked twice by pawns of the given color
	PawnsDouble [ColorLength]Bitboard
	// contains filtered or unexported fields
}