//C++ TO C# CONVERTER WARNING: The original C++ declaration of the following method implementation was not found:
public void filter_root_moves(Position pos, List <RootMove> rootMoves)
{
RootInTB = false;
UseRule50 = GlobalMembersUcioption.Options["Syzygy50MoveRule"];
ProbeDepth = GlobalMembersUcioption.Options["SyzygyProbeDepth"] * Depth.ONE_PLY;
Cardinality = GlobalMembersUcioption.Options["SyzygyProbeLimit"];
// Skip TB probing when no TB found: !TBLargest -> !TB::Cardinality
if (Cardinality > MaxCardinality)
{
Cardinality = MaxCardinality;
ProbeDepth = Depth.DEPTH_ZERO;
}
if (Cardinality < GlobalMembersBenchmark.popcount(pos.pieces()) || pos.can_castle(CastlingRight.ANY_CASTLING) != 0)
{
return;
}
// If the current root position is in the tablebases, then RootMoves
// contains only moves that preserve the draw or the win.
RootInTB = root_probe(pos, rootMoves, TB.Score);
if (RootInTB)
{
Cardinality = 0; // Do not probe tablebases during the search
}
else // If DTZ tables are missing, use WDL tables as a fallback
{
// Filter out moves that do not preserve the draw or the win.
RootInTB = root_probe_wdl(pos, rootMoves, TB.Score);
// Only probe during search if winning
if (RootInTB && TB.Score <= Value.VALUE_DRAW)
{
Cardinality = 0;
}
}
if (RootInTB && !UseRule50)
{
TB.Score = TB.Score > ((int)Value.VALUE_DRAW) != 0 ? Value.VALUE_MATE - MAX_PLY - 1 : TB.Score < ((int)Value.VALUE_DRAW) != 0 ? -Value.VALUE_MATE + MAX_PLY + 1 : Value.VALUE_DRAW;
}
}
public static Rank relative_rank(Color c, Square s)
{
return(GlobalMembersBenchmark.relative_rank(c, GlobalMembersBenchmark.rank_of(s)));
}
/// Only declared but not defined. We don't want to multiply two scores due to
/// a very high risk of overflow. So user should explicitly convert to integer.
//C++ TO C# CONVERTER TODO TASK: The implementation of the following method could not be found:
//Score operator *(Score s1, Score s2);
/// Division of a Score must be handled separately for each term
public static Score operator /(Score s, int i)
{
return(GlobalMembersBenchmark.make_score(GlobalMembersBenchmark.mg_value(s) / i, GlobalMembersBenchmark.eg_value(s) / i));
}