//-----------------------------------------------------------------------------------------------
public factor KNPKB(cPosicion pos)
{
sq sqPeon = pos.GetList(m_cFuerte, cPieza.PEON)[0];
sq alfilCasillaPeon = pos.GetList(m_cDebil, cPieza.ALFIL)[0];
sq weakerKingSq = pos.GetRey(m_cDebil);
if ((cBitBoard.Atras(m_cFuerte, sqPeon) & pos.attacks_from_square_piecetype(alfilCasillaPeon, cPieza.ALFIL)) != 0)
return cBitBoard.Distancia(weakerKingSq, sqPeon);
return cFactorEscala.NAN;
}
//-----------------------------------------------------------------------------------------------
public factor KQKRPs(cPosicion pos)
{
sq kingSq = pos.GetRey(m_cDebil);
sq nCasillaTorre = pos.GetList(m_cDebil, cPieza.TORRE)[0];
if (cTypes.FilaProxima(m_cDebil, kingSq) <= FILA.F2
&& cTypes.FilaProxima(m_cDebil, pos.GetRey(m_cFuerte)) >= FILA.F4
&& cTypes.FilaProxima(m_cDebil, nCasillaTorre) == FILA.F3
&& (pos.PiezasColor(m_cDebil, cPieza.PEON)
& pos.attacks_from_square_piecetype(kingSq, cPieza.REY)
& pos.AtaquesDePeon(nCasillaTorre, m_cFuerte)) != 0)
return cFactorEscala.TABLAS;
return cFactorEscala.NAN;
}
//-----------------------------------------------------------------------------------------------
public factor KBPKB(cPosicion pos)
{
sq sqPeon = pos.GetList(m_cFuerte, cPieza.PEON)[0];
sq strongerBishonCasillaPeon = pos.GetList(m_cFuerte, cPieza.ALFIL)[0];
sq weakerBishonCasillaPeon = pos.GetList(m_cDebil, cPieza.ALFIL)[0];
sq weakerKingSq = pos.GetRey(m_cDebil);
if (cTypes.Columna(weakerKingSq) == cTypes.Columna(sqPeon)
&& cTypes.FilaProxima(m_cFuerte, sqPeon) < cTypes.FilaProxima(m_cFuerte, weakerKingSq)
&& (cTypes.IsColorContrario(weakerKingSq, strongerBishonCasillaPeon)
|| cTypes.FilaProxima(m_cFuerte, weakerKingSq) <= FILA.F6))
return cFactorEscala.TABLAS;
if (cTypes.IsColorContrario(strongerBishonCasillaPeon, weakerBishonCasillaPeon))
{
if (cTypes.FilaProxima(m_cFuerte, sqPeon) <= FILA.F5)
return cFactorEscala.TABLAS;
else
{
bitbrd path = cBitBoard.Atras(m_cFuerte, sqPeon);
if ((path & pos.PiezasColor(m_cDebil, cPieza.REY)) != 0)
return cFactorEscala.TABLAS;
if (((pos.attacks_from_square_piecetype(weakerBishonCasillaPeon, cPieza.ALFIL) & path) != 0)
&& cBitBoard.Distancia(weakerBishonCasillaPeon, sqPeon) >= 3)
return cFactorEscala.TABLAS;
}
}
return cFactorEscala.NAN;
}
//-----------------------------------------------------------------------------------------------
public factor KBPPKB(cPosicion pos)
{
sq wbsq = pos.GetList(m_cFuerte, cPieza.ALFIL)[0];
sq bbsq = pos.GetList(m_cDebil, cPieza.ALFIL)[0];
if (!cTypes.IsColorContrario(wbsq, bbsq))
return cFactorEscala.NAN;
sq ksq = pos.GetRey(m_cDebil);
sq nCasillaPeon1 = pos.GetList(m_cFuerte, cPieza.PEON)[0];
sq nCasillaPeon2 = pos.GetList(m_cFuerte, cPieza.PEON)[1];
fila r1 = cTypes.Fila(nCasillaPeon1);
fila r2 = cTypes.Fila(nCasillaPeon2);
sq blockSq1, blockSq2;
if (cTypes.FilaProxima(m_cFuerte, nCasillaPeon1) > cTypes.FilaProxima(m_cFuerte, nCasillaPeon2))
{
blockSq1 = nCasillaPeon1 + cTypes.AtaquePeon(m_cFuerte);
blockSq2 = cTypes.CreaCasilla(cTypes.Columna(nCasillaPeon2), cTypes.Fila(nCasillaPeon1));
}
else
{
blockSq1 = nCasillaPeon2 + cTypes.AtaquePeon(m_cFuerte);
blockSq2 = cTypes.CreaCasilla(cTypes.Columna(nCasillaPeon1), cTypes.Fila(nCasillaPeon2));
}
switch (cBitBoard.ColumDistancia(nCasillaPeon1, nCasillaPeon2))
{
case 0:
if (cTypes.Columna(ksq) == cTypes.Columna(blockSq1)
&& cTypes.FilaProxima(m_cFuerte, ksq) >= cTypes.FilaProxima(m_cFuerte, blockSq1)
&& cTypes.IsColorContrario(ksq, wbsq))
return cFactorEscala.TABLAS;
else
return cFactorEscala.NAN;
case 1:
if (ksq == blockSq1
&& cTypes.IsColorContrario(ksq, wbsq)
&& (bbsq == blockSq2
|| (pos.attacks_from_square_piecetype(blockSq2, cPieza.ALFIL) & pos.PiezasColor(m_cDebil, cPieza.ALFIL)) != 0
|| Math.Abs(r1 - r2) >= 2))
return cFactorEscala.TABLAS;
else if (ksq == blockSq2
&& cTypes.IsColorContrario(ksq, wbsq)
&& (bbsq == blockSq1
|| (pos.attacks_from_square_piecetype(blockSq1, cPieza.ALFIL) & pos.PiezasColor(m_cDebil, cPieza.ALFIL)) != 0))
return cFactorEscala.TABLAS;
else
return cFactorEscala.NAN;
default:
return cFactorEscala.NAN;
}
}
//----------------------------------------------------------------------------------------------------------
public static pnt EvalRey(cPosicion pos, cEvalInfo ei, color colr)
{
color colorVS = (colr == cColor.BLANCO ? cColor.NEGRO : cColor.BLANCO);
bitbrd indefenso, b, b1, b2, safe;
int attackUnits;
sq nCasillaRey = pos.GetRey(colr);
pnt score = 0;
if (ei.m_AtaquesAlRey[colorVS] != 0)
{
indefenso = ei.m_Ataques[colorVS][cPieza.NAN] & ei.m_Ataques[colr][cPieza.REY] & ~(ei.m_Ataques[colr][cPieza.PEON] | ei.m_Ataques[colr][cPieza.CABALLO]
| ei.m_Ataques[colr][cPieza.ALFIL] | ei.m_Ataques[colr][cPieza.TORRE] | ei.m_Ataques[colr][cPieza.DAMA]);
attackUnits = Math.Min(20, (ei.m_AtaquesAlRey[colorVS] * ei.m_PesoAtaquesAlRey[colorVS]) / 2)
+ 3 * (ei.m_ZonaDelRey[colorVS] + cBitBoard.CountMax15(indefenso))
+ 2 * (ei.m_Clavadas[colr] != 0 ? 1 : 0)
- cTypes.GetMedioJuego(score) / 32;
b = indefenso & ei.m_Ataques[colorVS][cPieza.DAMA] & ~pos.PiezasColor(colorVS);
if (b != 0)
{
b &= (ei.m_Ataques[colorVS][cPieza.PEON] | ei.m_Ataques[colorVS][cPieza.CABALLO]
| ei.m_Ataques[colorVS][cPieza.ALFIL] | ei.m_Ataques[colorVS][cPieza.TORRE]);
if (b != 0)
attackUnits += QueenContactCheck
* cBitBoard.CountMax15(b)
* (colorVS == pos.ColorMueve() ? 2 : 1);
}
b = indefenso & ei.m_Ataques[colorVS][cPieza.TORRE] & ~pos.PiezasColor(colorVS);
b &= cBitBoard.m_PseudoAtaques[cPieza.TORRE][nCasillaRey];
if (b != 0)
{
b &= (ei.m_Ataques[colorVS][cPieza.PEON] | ei.m_Ataques[colorVS][cPieza.CABALLO]
| ei.m_Ataques[colorVS][cPieza.ALFIL] | ei.m_Ataques[colorVS][cPieza.DAMA]);
if (b != 0)
attackUnits += RookContactCheck
* cBitBoard.CountMax15(b)
* (colorVS == pos.ColorMueve() ? 2 : 1);
}
safe = ~(pos.PiezasColor(colorVS) | ei.m_Ataques[colr][cPieza.NAN]);
b1 = pos.attacks_from_square_piecetype(nCasillaRey, cPieza.TORRE) & safe;
b2 = pos.attacks_from_square_piecetype(nCasillaRey, cPieza.ALFIL) & safe;
b = (b1 | b2) & ei.m_Ataques[colorVS][cPieza.DAMA];
if (b != 0)
attackUnits += QueenCheck * cBitBoard.CountMax15(b);
b = b1 & ei.m_Ataques[colorVS][cPieza.TORRE];
if (b != 0)
attackUnits += RookCheck * cBitBoard.CountMax15(b);
b = b2 & ei.m_Ataques[colorVS][cPieza.ALFIL];
if (b != 0)
attackUnits += BishopCheck * cBitBoard.CountMax15(b);
b = pos.attacks_from_square_piecetype(nCasillaRey, cPieza.CABALLO) & ei.m_Ataques[colorVS][cPieza.CABALLO] & safe;
if (b != 0)
attackUnits += KnightCheck * cBitBoard.CountMax15(b);
attackUnits = Math.Min(99, Math.Max(0, attackUnits));
score -= m_ReyAmenazado[colr == cSearch.RootColor ? 1 : 0][attackUnits];
}
return score;
}
//----------------------------------------------------------------------------------------------------------
public static void Init(cPosicion pos, cEvalInfo evalInfo, color colr)
{
color colorVS = (colr == cColor.BLANCO ? cColor.NEGRO : cColor.BLANCO);
sq Down = (colr == cColor.BLANCO ? cCasilla.SUR : cCasilla.NORTE);
evalInfo.m_Clavadas[colr] = pos.pinned_pieces(colr);
bitbrd b = evalInfo.m_Ataques[colorVS][cPieza.REY] = pos.attacks_from_square_piecetype(pos.GetRey(colorVS), cPieza.REY);
evalInfo.m_Ataques[colr][cPieza.NAN] = evalInfo.m_Ataques[colr][cPieza.PEON] = evalInfo.m_Peones.GetPeonesAtaques(colr);
if (pos.GetNum(colr, cPieza.DAMA) != 0 && pos.MaterialPieza(colr) > cValoresJuego.DAMA_MJ + cValoresJuego.PEON_MJ)
{
evalInfo.m_ReyAcorralado[colorVS] = b | cBitBoard.Desplazamiento(b, Down);
b &= evalInfo.m_Ataques[colr][cPieza.PEON];
evalInfo.m_AtaquesAlRey[colr] = (b != 0) ? cBitBoard.CountMax15(b) : 0;
evalInfo.m_ZonaDelRey[colr] = evalInfo.m_PesoAtaquesAlRey[colr] = 0;
}
else
{
evalInfo.m_ReyAcorralado[colorVS] = 0;
evalInfo.m_AtaquesAlRey[colr] = 0;
}
}
//----------------------------------------------------------------------------------------------------------
public static pnt EvalPiezas(cPosicion pos, cEvalInfo ei, pnt[] mobility, bitbrd[] mobilityArea, type Pt, color colr)
{
if (colr == cColor.BLANCO && Pt == cPieza.REY)
{
return 0;
}
bitbrd b;
sq s;
pnt nPuntos = 0;
type NextPt = (colr == cColor.BLANCO ? Pt : (Pt + 1));
color colorVS = (colr == cColor.BLANCO ? cColor.NEGRO : cColor.BLANCO);
sq[] pl = pos.GetList(colr, Pt);
int plPos = 0;
ei.m_Ataques[colr][Pt] = 0;
while ((s = pl[plPos++]) != cCasilla.NONE)
{
b = Pt == cPieza.ALFIL ? cBitBoard.AtaquesPieza(s, pos.Piezas() ^ pos.PiezasColor(colr, cPieza.DAMA), cPieza.ALFIL)
: Pt == cPieza.TORRE ? cBitBoard.AtaquesPieza(s, pos.Piezas() ^ pos.PiezasColor(colr, cPieza.TORRE, cPieza.DAMA), cPieza.TORRE)
: pos.attacks_from_square_piecetype(s, Pt);
if ((ei.m_Clavadas[colr] & cBitBoard.m_nCasillas[s]) != 0)
b &= cBitBoard.m_EnLinea[pos.GetRey(colr)][s];
ei.m_Ataques[colr][cPieza.NAN] |= ei.m_Ataques[colr][Pt] |= b;
if ((b & ei.m_ReyAcorralado[colorVS]) != 0)
{
ei.m_AtaquesAlRey[colr]++;
ei.m_PesoAtaquesAlRey[colr] += KingAttackWeights[Pt];
bitbrd bb = (b & ei.m_Ataques[colorVS][cPieza.REY]);
if (bb != 0)
ei.m_ZonaDelRey[colr] += cBitBoard.CountMax15(bb);
}
if (Pt == cPieza.DAMA)
b &= ~(ei.m_Ataques[colorVS][cPieza.CABALLO]
| ei.m_Ataques[colorVS][cPieza.ALFIL]
| ei.m_Ataques[colorVS][cPieza.TORRE]);
int mob = (Pt != cPieza.DAMA ? cBitBoard.CountMax15(b & mobilityArea[colr])
: cBitBoard.Count(b & mobilityArea[colr]));
mobility[colr] += m_Movilidad[Pt][mob];
if ((ei.m_Ataques[colorVS][cPieza.PEON] & cBitBoard.m_nCasillas[s]) != 0)
nPuntos -= ThreatenedByPawn[Pt];
if (Pt == cPieza.ALFIL || Pt == cPieza.CABALLO)
{
if (Pt == cPieza.ALFIL)
nPuntos -= m_AlfilEnPeon * ei.m_Peones.PeonesMismoColor(colr, s);
if (0 == (pos.PiezasColor(colorVS, cPieza.PEON) & cBitBoard.AtaquePeon(colr, s)))
nPuntos += evaluate_outposts(pos, ei, s, Pt, colr);
if (cTypes.FilaProxima(colr, s) < FILA.F5 && (pos.GetNumPiezas(cPieza.PEON) & cBitBoard.m_nCasillas[(s + cTypes.AtaquePeon(colr))]) != 0)
nPuntos += m_CercaDePeon;
}
if (Pt == cPieza.TORRE)
{
if (cTypes.FilaProxima(colr, s) >= FILA.F5)
{
bitbrd pawns = pos.PiezasColor(colorVS, cPieza.PEON) & cBitBoard.m_PseudoAtaques[cPieza.TORRE][s];
if (pawns != 0)
nPuntos += cBitBoard.CountMax15(pawns) * m_TorreEnPeon;
}
if (ei.m_Peones.SemiAbierta(colr, cTypes.Columna(s)) != 0)
nPuntos += ei.m_Peones.SemiAbierta(colorVS, cTypes.Columna(s)) != 0 ? m_TorreColAbierta : m_TorreColumnaSemiAbierta;
if (mob > 3 || ei.m_Peones.SemiAbierta(colr, cTypes.Columna(s)) != 0)
continue;
sq ksq = pos.GetRey(colr);
if (((cTypes.Columna(ksq) < COLUMNA.E) == (cTypes.Columna(s) < cTypes.Columna(ksq)))
&& (cTypes.Fila(ksq) == cTypes.Fila(s) || cTypes.FilaProxima(colr, ksq) == FILA.F1)
&& 0 == ei.m_Peones.SemiAbierta(colr, cTypes.Columna(ksq), cTypes.Columna(s) < cTypes.Columna(ksq)))
nPuntos -= (m_TorreAtrapada - cTypes.Puntua(mob * 8, 0)) * (1 + (pos.CanEnroque(colr) == 0 ? 1 : 0));
}
if (Pt == cPieza.ALFIL
&& pos.IsChess960() != false
&& (s == cTypes.CasillaProxima(colr, cCasilla.A1) || s == cTypes.CasillaProxima(colr, cCasilla.H1)))
{
sq d = cTypes.AtaquePeon(colr) + (cTypes.Columna(s) == COLUMNA.A ? cCasilla.ESTE : cCasilla.OESTE);
if (pos.GetPieza(s + d) == cTypes.CreaPieza(colr, cPieza.PEON))
nPuntos -= !pos.CasillaVacia(s + d + cTypes.AtaquePeon(colr)) ? m_AlfilAtrapado * 4
: pos.GetPieza(s + d + d) == cTypes.CreaPieza(colr, cPieza.PEON) ? m_AlfilAtrapado * 2
: m_AlfilAtrapado;
}
}
return nPuntos - EvalPiezas(pos, ei, mobility, mobilityArea, NextPt, colorVS);
}
//-----------------------------------------------------------------------------------------------------------------------------------
public static pnt EvalPeonesPasados(cPosicion pos, cEvalInfo ei, color colr)
{
color colorVS = (colr == cColor.BLANCO ? cColor.NEGRO : cColor.BLANCO);
bitbrd b, squaresToQueen, defendedSquares, unsafeSquares;
pnt nPuntos = 0;
b = ei.m_Peones.GetPeonesPasados(colr);
while (b != 0)
{
sq casilla = cBitBoard.GetLSB(ref b);
int r = (int)(cTypes.FilaProxima(colr, casilla) - FILA.F2);
int rr = r * (r - 1);
val mbonus = (17 * rr), ebonus = (7 * (rr + r + 1));
if (rr != 0)
{
sq blockSq = casilla + cTypes.AtaquePeon(colr);
ebonus += (cBitBoard.Distancia(pos.GetRey(colorVS), blockSq) * 5 * rr)
- (cBitBoard.Distancia(pos.GetRey(colr), blockSq) * 2 * rr);
if (cTypes.FilaProxima(colr, blockSq) != FILA.F8)
ebonus -= (cBitBoard.Distancia(pos.GetRey(colr), blockSq + cTypes.AtaquePeon(colr)) * rr);
if (pos.CasillaVacia(blockSq))
{
squaresToQueen = cBitBoard.Atras(colr, casilla);
if ((cBitBoard.Atras(colorVS, casilla) & pos.PiezasColor(colorVS, cPieza.TORRE, cPieza.DAMA)) != 0
&& (cBitBoard.Atras(colorVS, casilla) & pos.PiezasColor(colorVS, cPieza.TORRE, cPieza.DAMA) & pos.attacks_from_square_piecetype(casilla, cPieza.TORRE)) != 0)
unsafeSquares = squaresToQueen;
else
unsafeSquares = squaresToQueen & (ei.m_Ataques[colorVS][cPieza.NAN] | pos.PiezasColor(colorVS));
if ((cBitBoard.Atras(colorVS, casilla) & pos.PiezasColor(colr, cPieza.TORRE, cPieza.DAMA)) != 0
&& (cBitBoard.Atras(colorVS, casilla) & pos.PiezasColor(colr, cPieza.TORRE, cPieza.DAMA) & pos.attacks_from_square_piecetype(casilla, cPieza.TORRE)) != 0)
defendedSquares = squaresToQueen;
else
defendedSquares = squaresToQueen & ei.m_Ataques[colr][cPieza.NAN];
int k = 0 == unsafeSquares ? 15 : 0 == (unsafeSquares & cBitBoard.m_nCasillas[blockSq]) ? 9 : 0;
if (defendedSquares == squaresToQueen)
k += 6;
else if ((defendedSquares & cBitBoard.m_nCasillas[blockSq]) != 0)
k += 4;
mbonus += (k * rr); ebonus += (k * rr);
}
} //-- rr != 0
if (pos.GetNum(colr, cPieza.PEON) < pos.GetNum(colorVS, cPieza.PEON))
ebonus += ebonus / 4;
nPuntos += cTypes.Puntua(mbonus, ebonus);
}
return cEval.SetPesos(nPuntos, m_Pesos[cEvalPesos.PEONES_PASADOS]);
}
//----------------------------------------------------------------------------------------
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 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);
}
