static Bitboard GenerateReducedMagic(int square, bool bishop)
{
Bitboard occBB = Bitboards.RookPremasks[square];
if (bishop)
{
occBB = Bitboards.BishopPremasks[square];
}
Bitboard[] permutations = MagicBitboardFactory.GeneratePermutations(occBB);
Bitboard[] moves = MagicBitboardFactory.GenerateMovesFromPermutations(
square,
permutations,
bishop ? MagicBitboardFactory.BishopOffsets : MagicBitboardFactory.RookOffsets);
return(MagicBitboardFactory.GenerateMagicNumber(permutations, moves, 1));
}
static void GenerateMagics(string piece, Bitboard[] occupancyBBs, int[] offsets, string filename)
{
Bitboard[] result = new Bitboard[64];
DateTime start = DateTime.Now;
for (int i = 0; i < 64; i++)
{
Console.Write($"Generating {piece} magic for square {i}...");
var permutations = MagicBitboardFactory.GeneratePermutations(occupancyBBs[i]);
var moves = MagicBitboardFactory.GenerateMovesFromPermutations(i, permutations, offsets);
result[i] = MagicBitboardFactory.GenerateMagicNumber(permutations, moves);
Console.WriteLine("Done");
}
Console.WriteLine($"Total Elapsed Time: {(DateTime.Now - start).ToString()}");
if (File.Exists(filename))
{
File.Delete(filename);
}
MagicBitboardFactory.WriteMagicsToFile(filename, result);
}
public void CalculatesCorrectly()
{
Bitboard[] expected = { 0, 1, 2, 3, 0x0000008000000000UL, 0x0000008000000001UL, 0x0000008000000002UL, 0x0000008000000003UL };
Bitboard[] actual = MagicBitboardFactory.GeneratePermutations(0x8000000003UL);
TestUtils.TestArrayEquality(expected, actual);
}