private static Bitboard[] InitializeConnections()
{
var result = new Bitboard[ChessConstants.SquareCount * ChessConstants.SquareCount];
result.Initialize(i => Bitboard.Everything);
for (var squareIndex = 0; squareIndex < ChessConstants.SquareCount; squareIndex++)
{
var source = Bitboard.FromSquareIndex(squareIndex);
foreach (var direction in AllDirections)
{
var current = source;
var connection = Bitboard.None;
while ((current = current.Shift(direction)).IsAny)
{
var anotherSquareIndex = current.FindFirstSquareIndex();
var index = GetConnectionIndex(squareIndex, anotherSquareIndex);
var reverseIndex = GetConnectionIndex(anotherSquareIndex, squareIndex);
result[index] = result[reverseIndex] = connection;
connection |= current;
}
}
}
return(result);
}
