- // kingZone[color] is the zone around the enemy king which is considered
- // by the king safety evaluation. This consists of the squares directly
- // adjacent to the king, and the three (or two, for a king on an edge file)
- // squares two ranks in front of the king. For instance, if black's king
- // is on g8, kingZone[WHITE] is a bitboard containing the squares f8, h8,
- // f7, g7, h7, f6, g6 and h6.
- Bitboard kingZone[2];