private static ulong[] RookMoves()
{
var Result = new ulong[64];
var Address = new BoardAddress(0);
for (int i = 0; i < 64; i++)
{
Address.Index = i;
Result[i] = Masks.Ranks[Address.Rank] ^ Masks.Files[Address.File];
}
return(Result);
}
private static ulong[] BishopMoves()
{
var Result = new ulong[64];
var Address = new BoardAddress(0);
for (int i = 0; i < 64; i++)
{
Address.Index = i;
Result[i] = Masks.Slash[Address.SlashIndex] ^ Masks.BackSlash[Address.BackSlashIndex];
}
return(Result);
}
private static ulong[] PawnMoves(bool white)
{
var Result = new ulong[64];
ulong Position = 1;
var Address = new BoardAddress(0);
for (int i = 0; i < 64; i++)
{
Address.Index = i;
if (white) // white
{
if (Address.Rank > 0)
{
Result[i] = Position << 8; // single move
if (Address.Rank == 1)
{
Result[i] |= Position << 16; // double move
}
}
else
{
Result[i] = 0; // not applicable
}
}
else // black
{
if (Address.Rank < 7)
{
Result[i] = Position >> 8; // single move
if (Address.Rank == 6)
{
Result[i] |= Position >> 16; // double move
}
}
else
{
Result[i] = 0; // not applicable
}
}
Position <<= 1;
}
return(Result);
}
private static ulong[] PawnCaptures(bool white)
{
var Result = new ulong[64];
ulong Position = 1;
ulong Moves = 0;
var Address = new BoardAddress(0);
for (int i = 0; i < 64; i++)
{
Address.Index = i;
if (white) // white
{
if (Address.Rank > 0)
{
Moves = (Position << 7) & ~Masks.FileH;
Moves |= (Position << 9) & ~Masks.FileA;
Result[i] = Moves;
}
else
{
Result[i] = 0; // not applicable
}
}
else // black
{
if (Address.Rank < 7)
{
Moves = (Position >> 7) & ~Masks.FileA;
Moves |= (Position >> 9) & ~Masks.FileH;
Result[i] = Moves;
}
else
{
Result[i] = 0; // not applicable
}
}
Position <<= 1;
}
return(Result);
}