// ~2.3 MHz: slowed mostly by IsLegal() and only slightly by resetMove()
protected Boolean tryMove(ref Move move, Boolean bFindRepetition = true, Boolean bQxnt = false)
{
CurrentMove = move; // Current Pseudo Move
(bool bPrevented, bool bRestricted) = isPinned(move);
if (bPrevented) // Skip moves which violate known pins
{
GameState.AtomicIncrement(ref State.PinSkipTotal);
return(false);
}
//[Timer]timeMove(move);
//
//[Note]resetMove() is called here because it is needed for every subsequent move. This leaves
// a window between the time initNode() initializes a node and when resetMove() is first called.
//
resetMove();
this.move(ref move);
if (IsDraw0())
{
clrEval(); // Captures and Pawn moves invalidate staticEval()
}
//[Note]If En Passant was possible, any move ends a Transposition Group
if (Parent.IsPassed())
{
setDraw0();
}
testHash(); // Conditional
var bLegal = IsLegal(bFindRepetition, bRestricted);
if (isDefined(move))
{
if (bLegal)
{
CurrentMove = move = annotateEarly(move);
}
else
{
restrictPiece(move);
}
}
State.IncMove(bLegal, bQxnt);
State.MonitorBound(this); // Pass position so heartbeat() can build getCurrentMoves()
return(bLegal);
}
protected Boolean nullMove()
{
CurrentMove = Move.NullMove; // Current Pseudo Move
resetMove();
skipTurn();
//[Note]If En Passant was possible, any move ends a Transposition Group
if (Parent.IsPassed())
{
setDraw0();
}
testHash(); // Conditional
var bLegal = !InCheck();
if (!bLegal)
{
throw new BoardException("Illegal Null Move");
}
GameState.AtomicIncrement(ref State.NullMoveTotal);
State.MonitorBound(this);
return(bLegal);
}