private void _NL_SolResult(UCellLink LK0, UCellLink LKnxt, Stack <UCellLink> SolStack, int SolType)
{
string st = "";
List <UCellLink> SolLst = SolStack.ToList();
SolLst.Reverse();
SolLst.Add(LK0);
foreach (var LK in SolLst)
{
int noB = (1 << LK.no);
UCell P1 = pBDL[LK.rc1], P2 = pBDL[LK.rc2];
P2.SetCellBgColor(SolBkCr);
if (LK.type == S)
{
P1.SetNoBColor(noB, AttCr); P2.SetNoBColor(noB, AttCr3);
}
else
{
P2.SetNoBColor(noB, AttCr); P1.SetNoBColor(noB, AttCr3);
}
}
if (SolType == 1)
{
st = "Nice Loop(Continuous)"; //continuous
}
else //discontinuous
{
st = $"Nice Loop(Discontinuous) r{(LK0.rc1/9+1)}c{(LK0.rc1%9+1)}";
int dcTyp = LK0.type * 10 + LKnxt.type;
switch (dcTyp)
{
case 11: st += $" is {(LK0.no+1)}"; break; //S->S
case 12: st += $" is not {(LKnxt.no+1)}"; break; //S->W
case 21: st += $" is not {(LK0.no+1)}"; break; //W->S
case 22: st += $" is not {(LK0.no+1)}"; break; //W->W
}
}
Result = st;
ResultLong = st + "\r" + _ToRCSequenceString(SolStack);
}
private void _developDisp2Ex(Bit81[] GLC)
{
List <UCell> qBDL = new List <UCell>();
pBDL.ForEach(p => qBDL.Add(p.Copy()));
foreach (var P in qBDL.Where(q => q.FreeB > 0))
{
int E = 0;
for (int n = 0; n < 9; n++)
{
if (GLC[n].IsHit(P.rc))
{
E |= (1 << n);
}
}
if (E > 0)
{
UCell Q = pBDL[P.rc];
P.SetNoBBgColor(E, Colors.White, Colors.PowderBlue);
P.SetNoBColorRev(E, Colors.Blue);
Q.SetNoBBgColor(E, Colors.White, Colors.PowderBlue);
Q.SetNoBColorRev(E, Colors.Red);
int sb = Q.FreeB.DifSet(E);
Q.CancelB = E;
if (sb.BitCount() == 1)
{
Q.FixedNo = sb.BitToNum() + 1;
SolCode = 1;
}
else if (sb.BitCount() == 0)
{
Q.SetCellBgColor(Colors.Violet);
}
}
}
devWin.Set_dev_GBoard(qBDL);
}
//XYwing is an algorithm that consists of two WeakLinks with common cells.
//http://csdenpe.web.fc2.com/page42.html
public bool XYwing( )
{
Prepare();
CeLKMan.PrepareCellLink(2); //Generate WeakLinks
if (BVCellLst == null)
{
BVCellLst = pBDL.FindAll(p => (p.FreeBC == 2)); //Generate BVs(BV:bivalue).
}
if (BVCellLst.Count < 3)
{
return(false);
}
bool XYwing = false;
foreach (var P0 in BVCellLst) //Choose one BV_Cell(=>PS)
{
List <UCellLink> BVLKLst = CeLKMan.IEGetRcNoBTypB(P0.rc, 0x1FF, 2).Where(R => R.BVFlag).ToList();
//Extract WeakLinks starting from P0
//foreach( var P in BVLKLst ) WriteLine(P);
if (BVLKLst.Count < 2)
{
continue;
}
var cmb = new Combination(BVLKLst.Count, 2);
int nxt = 1;
while (cmb.Successor(nxt)) //Combine two WLinks from BVLKLst
{
UCellLink LKA = BVLKLst[cmb.Index[0]], LKB = BVLKLst[cmb.Index[1]]; //(
UCell Q = LKA.UCe2, R = LKB.UCe2;
if (Q.rc == R.rc || LKA.no == LKB.no)
{
continue; //Two WLinks have different end and different digits
}
Bit81 Q81 = ConnectedCells[LKA.rc2] & ConnectedCells[LKB.rc2];
if (Q81.Count <= 0)
{
continue; //Two WLinks have cells connected indirectly
}
int noB = Q.FreeB.DifSet(1 << LKA.no) & R.FreeB.DifSet(1 << LKB.no);
if (noB == 0)
{
continue; //Two WLinks have common digit(=>no).
}
int no = noB.BitToNum();
string msg2 = "";
foreach (var A in Q81.IEGetUCeNoB(pBDL, noB))
{
if (A == P0 || A == Q || A == R)
{
continue;
}
A.CancelB = noB; XYwing = true; //cell(A)/digit(no) can be excluded
if (SolInfoB)
{
msg2 += $" {A.rc.ToRCNCLString()}(#{no+1})";
}
}
if (XYwing)
{
SolCode = 2;
P0.SetNoBColor(P0.FreeB, AttCr); P0.SetCellBgColor(SolBkCr);
Q.SetCellBgColor(SolBkCr); R.SetCellBgColor(SolBkCr);
string msg0 = $" Pivot: {_XYwingResSub(P0)}";
string msg1 = $" Pin: {_XYwingResSub(R)} ,{_XYwingResSub(Q)}";
Result = "XY Wing" + msg0;
if (SolInfoB)
{
ResultLong = $"XY Wing\r {msg0}\r {msg1}\r Eliminated:{msg2}";
}
if (__SimpleAnalizerB__)
{
return(true);
}
if (!pAnMan.SnapSaveGP())
{
return(true);
}
XYwing = false;
}
}
}
return(false);
}