//----------------------------------------------------------------------------------------
public static int Enroques(cPosicion pos, cMov[] mlist, int mPos, color us, cInfoJaque ci, enroque Cr, bool Checks, bool Chess960)
{
bool KingSide = (Cr==cEnroque.OO_BLANCAS||Cr==cEnroque.OO_NEGRAS);
if(pos.CanNotEnroque(Cr)||0==pos.PosibleEnrocar(Cr))
return mPos;
sq kfrom = pos.GetRey(us);
sq rfrom = pos.CasillaTorreEnroque(Cr);
sq kto = cTypes.CasillaProxima(us, KingSide ? cCasilla.G1 : cCasilla.C1);
bitbrd enemies = pos.PiezasColor(cTypes.Contrario(us));
sq K = Chess960 ? kto>kfrom ? cCasilla.OESTE : cCasilla.ESTE : KingSide ? cCasilla.OESTE : cCasilla.ESTE;
for(sq s = kto; s!=kfrom; s+=K)
if((pos.AtaquesA(s)&enemies)!=0)
return mPos;
if(Chess960&&(cBitBoard.AtaquesPieza(kto, pos.Piezas()^cBitBoard.m_nCasillas[rfrom], cPieza.TORRE)&pos.PiezasColor(cTypes.Contrario(us), cPieza.TORRE, cPieza.DAMA))!=0)
return mPos;
mov m = cTypes.CreaMov(kfrom, rfrom, cMovType.ENROQUE, cPieza.CABALLO);
if(Checks&&!pos.IsJaque(m, ci))
return mPos;
mlist[mPos++].m=m;
return mPos;
}
//----------------------------------------------------------------------------------------
public static int Capturas(cPosicion pos, cMov[] mlist, int mPos, type Type)
{
color us = pos.ColorMueve();
bitbrd target = Type==cMovType.CAPTURES ? pos.PiezasColor(cTypes.Contrario(us))
: Type==cMovType.QUIETS ? ~pos.Piezas()
: Type==cMovType.NON_EVASIONS ? ~pos.PiezasColor(us) : 0;
return us==cColor.BLANCO ? ToDO(pos, mlist, mPos, target, cColor.BLANCO, Type, null)
: ToDO(pos, mlist, mPos, target, cColor.NEGRO, Type, null);
}
public static bool minThan(ref cMov f, ref cMov s)
{
return f.v < s.v;
}
//----------------------------------------------------------------------------------------
public static int ToDO(cPosicion pos, cMov[] mlist, int mPos, bitbrd target, color us, type Type, cInfoJaque ci)
{
bool Checks = Type==cMovType.QUIET_CHECKS;
mPos=Peones(pos, mlist, mPos, target, ci, us, Type);
mPos=Piezas(pos, mlist, mPos, us, target, ci, cPieza.CABALLO, Checks);
mPos=Piezas(pos, mlist, mPos, us, target, ci, cPieza.ALFIL, Checks);
mPos=Piezas(pos, mlist, mPos, us, target, ci, cPieza.TORRE, Checks);
mPos=Piezas(pos, mlist, mPos, us, target, ci, cPieza.DAMA, Checks);
if(Type!=cMovType.QUIET_CHECKS&&Type!=cMovType.EVASIONS)
{
sq ksq = pos.GetRey(us);
bitbrd b = pos.attacks_from_square_piecetype(ksq, cPieza.REY)⌖
while(b!=0)
mlist[mPos++].m=cTypes.CreaMov(ksq, cBitBoard.GetLSB(ref b));
}
if(Type!=cMovType.CAPTURES&&Type!=cMovType.EVASIONS&&pos.CanEnroque(us)!=0)
{
if (pos.IsChess960() != false)
{
mPos=Enroques(pos, mlist, mPos, us, ci, (new cEnroque(us, cEnroque.LADO_REY)).m_Tipo, Checks, true);
mPos=Enroques(pos, mlist, mPos, us, ci, (new cEnroque(us, cEnroque.LADO_DAMA)).m_Tipo, Checks, true);
}
else
{
mPos=Enroques(pos, mlist, mPos, us, ci, (new cEnroque(us, cEnroque.LADO_REY)).m_Tipo, Checks, false);
mPos=Enroques(pos, mlist, mPos, us, ci, (new cEnroque(us, cEnroque.LADO_DAMA)).m_Tipo, Checks, false);
}
}
return mPos;
}
//----------------------------------------------------------------------------------------
public static int Piezas(cPosicion pos, cMov[] mlist, int mPos, color us, bitbrd target, cInfoJaque ci, type Pt, bool Checks)
{
sq[] pieceList = pos.GetList(us, Pt);
int pl = 0;
for(sq from = pieceList[pl]; from!=cCasilla.NONE; from=pieceList[++pl])
{
if(Checks)
{
if((Pt==cPieza.ALFIL||Pt==cPieza.TORRE||Pt==cPieza.DAMA)
&&0==(cBitBoard.m_PseudoAtaques[Pt][from]&target&ci.m_Jaque[Pt]))
continue;
if(ci.m_Candidatas!=0&&(ci.m_Candidatas&cBitBoard.m_nCasillas[from])!=0)
continue;
}
bitbrd b = pos.attacks_from_square_piecetype(from, Pt)⌖
if(Checks)
b&=ci.m_Jaque[Pt];
while(b!=0)
mlist[mPos++].m=cTypes.CreaMov(from, cBitBoard.GetLSB(ref b));
}
return mPos;
}
//----------------------------------------------------------------------------------------
public static int Promocion(cMov[] mlist, int mPos, bitbrd pawnsOn7, bitbrd target, cInfoJaque ci, type Type, sq Delta)
{
bitbrd b = cBitBoard.Desplazamiento(pawnsOn7, Delta)⌖
while(b!=0)
{
sq to = cBitBoard.GetLSB(ref b);
if(Type==cMovType.CAPTURES||Type==cMovType.EVASIONS||Type==cMovType.NON_EVASIONS)
mlist[mPos++].m=cTypes.CreaMov(to-Delta, to, cMovType.PROMOCION, cPieza.DAMA);
if(Type==cMovType.QUIETS||Type==cMovType.EVASIONS||Type==cMovType.NON_EVASIONS)
{
mlist[mPos++].m=cTypes.CreaMov(to-Delta, to, cMovType.PROMOCION, cPieza.TORRE);
mlist[mPos++].m=cTypes.CreaMov(to-Delta, to, cMovType.PROMOCION, cPieza.ALFIL);
mlist[mPos++].m=cTypes.CreaMov(to-Delta, to, cMovType.PROMOCION, cPieza.CABALLO);
}
if(Type==cMovType.QUIET_CHECKS&&(cBitBoard.m_Ataques[cPieza.CABALLO_BLANCO][to]&cBitBoard.m_nCasillas[ci.m_SqRey])!=0)
mlist[mPos++].m=cTypes.CreaMov(to-Delta, to, cMovType.PROMOCION, cPieza.CABALLO);
}
return mPos;
}
//----------------------------------------------------------------------------------------
public static int Peones(cPosicion pos, cMov[] mlist, int mPos, bitbrd target, cInfoJaque ci, color colr, type Type)
{
color colorVS = (colr==cColor.BLANCO ? cColor.NEGRO : cColor.BLANCO);
bitbrd TRank8BB = (colr==cColor.BLANCO ? cBitBoard.F8 : cBitBoard.F1);
bitbrd TRank7BB = (colr==cColor.BLANCO ? cBitBoard.F7 : cBitBoard.F2);
bitbrd TRank3BB = (colr==cColor.BLANCO ? cBitBoard.F3 : cBitBoard.F6);
sq Up = (colr==cColor.BLANCO ? cCasilla.NORTE : cCasilla.SUR);
sq Right = (colr==cColor.BLANCO ? cCasilla.NORTE_ESTE : cCasilla.SUR_OESTE);
sq Left = (colr==cColor.BLANCO ? cCasilla.NORTE_OESTE : cCasilla.SUR_ESTE);
bitbrd b1, b2, dc1, dc2, emptySquares = 0;
bitbrd pawnsOn7 = pos.PiezasColor(colr, cPieza.PEON)&TRank7BB;
bitbrd pawnsNotOn7 = pos.PiezasColor(colr, cPieza.PEON)&~TRank7BB;
bitbrd enemies = (Type==cMovType.EVASIONS ? pos.PiezasColor(colorVS)&target :
Type==cMovType.CAPTURES ? target : pos.PiezasColor(colorVS));
if(Type!=cMovType.CAPTURES)
{
emptySquares=(Type==cMovType.QUIETS||Type==cMovType.QUIET_CHECKS ? target : ~pos.Piezas());
b1=cBitBoard.Desplazamiento(pawnsNotOn7, Up)&emptySquares;
b2=cBitBoard.Desplazamiento(b1&TRank3BB, Up)&emptySquares;
if(Type==cMovType.EVASIONS)
{
b1&=target;
b2&=target;
}
if(Type==cMovType.QUIET_CHECKS)
{
b1&=pos.AtaquesDePeon(ci.m_SqRey, colorVS);
b2&=pos.AtaquesDePeon(ci.m_SqRey, colorVS);
if((pawnsNotOn7&ci.m_Candidatas)!=0)
{
dc1=cBitBoard.Desplazamiento(pawnsNotOn7&ci.m_Candidatas, Up)&emptySquares&~cBitBoard.GetColumnaSq(ci.m_SqRey);
dc2=cBitBoard.Desplazamiento(dc1&TRank3BB, Up)&emptySquares;
b1|=dc1;
b2|=dc2;
}
}
while(b1!=0)
{
sq to = cBitBoard.GetLSB(ref b1);
mlist[mPos++].m=cTypes.CreaMov(to-Up, to);
}
while(b2!=0)
{
sq to = cBitBoard.GetLSB(ref b2);
mlist[mPos++].m=cTypes.CreaMov(to-Up-Up, to);
}
}
if(pawnsOn7!=0&&(Type!=cMovType.EVASIONS||(target&TRank8BB)!=0))
{
if(Type==cMovType.CAPTURES)
emptySquares=~pos.Piezas();
if(Type==cMovType.EVASIONS)
emptySquares&=target;
mPos=Promocion(mlist, mPos, pawnsOn7, enemies, ci, Type, Right);
mPos=Promocion(mlist, mPos, pawnsOn7, enemies, ci, Type, Left);
mPos=Promocion(mlist, mPos, pawnsOn7, emptySquares, ci, Type, Up);
}
if(Type==cMovType.CAPTURES||Type==cMovType.EVASIONS||Type==cMovType.NON_EVASIONS)
{
b1=cBitBoard.Desplazamiento(pawnsNotOn7, Right)&enemies;
b2=cBitBoard.Desplazamiento(pawnsNotOn7, Left)&enemies;
while(b1!=0)
{
sq to = cBitBoard.GetLSB(ref b1);
mlist[mPos++].m=cTypes.CreaMov(to-Right, to);
}
while(b2!=0)
{
sq to = cBitBoard.GetLSB(ref b2);
mlist[mPos++].m=cTypes.CreaMov(to-Left, to);
}
if(pos.CasillaEnPaso()!=cCasilla.NONE)
{
if(Type==cMovType.EVASIONS&&(target&cBitBoard.m_nCasillas[(pos.CasillaEnPaso()-Up)])==0)
return mPos;
b1=pawnsNotOn7&pos.AtaquesDePeon(pos.CasillaEnPaso(), colorVS);
while(b1!=0)
mlist[mPos++].m=cTypes.CreaMov(cBitBoard.GetLSB(ref b1), pos.CasillaEnPaso(), cMovType.ENPASO, cPieza.CABALLO);
}
}
return mPos;
}
//----------------------------------------------------------------------------------------
public static int JugadasLegales(cPosicion pos, cMov[] mlist, int mPos)
{
int end, cur = mPos;
bitbrd pinned = pos.pinned_pieces(pos.ColorMueve());
sq ksq = pos.GetRey(pos.ColorMueve());
end=pos.Jaques()!=0 ? Evasiones(pos, mlist, mPos)
: Generar(pos, mlist, mPos, cMovType.NON_EVASIONS);
while(cur!=end)
if((pinned!=0||cTypes.GetFromCasilla(mlist[cur].m)==ksq||cTypes.TipoMovimiento(mlist[cur].m)==cMovType.ENPASO)
&&!pos.IsLegalMov(mlist[cur].m, pinned))
mlist[cur].m=mlist[--end].m;
else
++cur;
return end;
}
//----------------------------------------------------------------------------------------
public static int Jaques(cPosicion pos, cMov[] mlist, int mPos)
{
color us = pos.ColorMueve();
cInfoJaque ci = new cInfoJaque(pos);
bitbrd dc = ci.m_Candidatas;
while(dc!=0)
{
sq from = cBitBoard.GetLSB(ref dc);
type pt = cTypes.TipoPieza(pos.GetPieza(from));
if(pt==cPieza.PEON)
continue;
bitbrd b = pos.AtaquesDePieza((pieza)pt, from)&~pos.Piezas();
if(pt==cPieza.REY)
b&=~cBitBoard.m_PseudoAtaques[cPieza.DAMA][ci.m_SqRey];
while(b!=0)
mlist[mPos++].m=cTypes.CreaMov(from, cBitBoard.GetLSB(ref b));
}
return us==cColor.BLANCO ? ToDO(pos, mlist, mPos, ~pos.Piezas(), cColor.BLANCO, cMovType.QUIET_CHECKS, ci) :
ToDO(pos, mlist, mPos, ~pos.Piezas(), cColor.NEGRO, cMovType.QUIET_CHECKS, ci);
}
//----------------------------------------------------------------------------------------
public static int Generar(cPosicion pos, cMov[] mlist, int mPos, type Type)
{
switch(Type)
{
case cMovType.LEGAL:
return JugadasLegales(pos, mlist, mPos);
case cMovType.CAPTURES:
return Capturas(pos, mlist, mPos, Type);
case cMovType.QUIETS:
return Capturas(pos, mlist, mPos, Type);
case cMovType.NON_EVASIONS:
return Capturas(pos, mlist, mPos, Type);
case cMovType.EVASIONS:
return Evasiones(pos, mlist, mPos);
case cMovType.QUIET_CHECKS:
return Jaques(pos, mlist, mPos);
}
return 0;
}
//----------------------------------------------------------------------------------------
public static int Evasiones(cPosicion pos, cMov[] mlist, int mPos)
{
color us = pos.ColorMueve();
sq ksq = pos.GetRey(us);
bitbrd sliderAttacks = 0;
bitbrd sliders = pos.Jaques()&~pos.GetNumPiezas(cPieza.CABALLO, cPieza.PEON);
while(sliders!=0)
{
sq checksq = cBitBoard.GetLSB(ref sliders);
sliderAttacks|=cBitBoard.m_EnLinea[checksq][ksq]^cBitBoard.m_nCasillas[checksq];
}
bitbrd b = pos.attacks_from_square_piecetype(ksq, cPieza.REY)&~pos.PiezasColor(us)&~sliderAttacks;
while(b!=0)
mlist[mPos++].m=cTypes.CreaMov(ksq, cBitBoard.GetLSB(ref b));
if(cBitBoard.MayorQue(pos.Jaques()))
return mPos;
sq checksq2 = cBitBoard.LSB(pos.Jaques());
bitbrd target = cBitBoard.Entre(checksq2, ksq)|cBitBoard.m_nCasillas[checksq2];
return us==cColor.BLANCO ? ToDO(pos, mlist, mPos, target, cColor.BLANCO, cMovType.EVASIONS, null) :
ToDO(pos, mlist, mPos, target, cColor.NEGRO, cMovType.EVASIONS, null);
}
