public bool IsThreefoldRepetition()
{
if (NullMoves == 0 && _hashes.Count() >= 8)
{
var first = _hashes.Peek(3);
var second = _hashes.Peek(7);
if (Hash == first && first == second)
{
return(true);
}
}
return(false);
}
public bool IsThreefoldRepetition()
{
var positionsToCheck = Math.Min(_hashes.Count(), IrreversibleMovesCount + 1);
if (NullMoves == 0 && positionsToCheck >= 8)
{
var repetitionsCount = 1;
for (var positionIndex = 1; positionIndex < positionsToCheck; positionIndex += 2)
{
if (_hashes.Peek(positionIndex) == Hash)
{
repetitionsCount++;
if (repetitionsCount >= 3)
{
return(true);
}
}
}
}
return(false);
}