private void FindUncoveringMoves(int maxExtraSuits)
{
// Find all uncovering moves.
UncoveringMoves.Clear();
for (int from = 0; from < NumberOfPiles; from++)
{
Pile fromPile = FindTableau[from];
int fromRow = fromPile.Count - RunFinder.GetRunUpAnySuit(from);
if (fromRow == 0)
{
continue;
}
int fromSuits = RunFinder.CountSuits(from, fromRow);
Card fromCard = fromPile[fromRow];
PileList faceList = FaceLists[(int)fromCard.Face + 1];
for (int i = 0; i < faceList.Count; i++)
{
HoldingStack.Clear();
int to = faceList[i];
if (fromSuits - 1 > maxExtraSuits)
{
int holdingSuits = FindHolding(FindTableau, HoldingStack, false, fromPile, from, fromRow, fromPile.Count, to, maxExtraSuits);
if (fromSuits - 1 > maxExtraSuits + holdingSuits)
{
break;
}
}
Pile toPile = FindTableau[to];
Card toCard = toPile[toPile.Count - 1];
int order = GetOrder(toCard, fromCard);
UncoveringMoves.Add(new Move(from, fromRow, to, order, AddHolding(HoldingStack.Set)));
}
}
}
private bool TryAddOneRunMove(int oneRun, int target)
{
Pile oneRunPile = WorkingTableau[oneRun];
if (oneRunPile.Count == 0)
{
return(false);
}
Card oneRunRootCard = oneRunPile[0];
// Check whether the one run pile matches the target pile.
Card targetCard = WorkingTableau.GetCard(target);
if (!oneRunRootCard.IsSourceFor(targetCard))
{
return(false);
}
// Check whether we can make the move.
int oneRunSuits = oneRunPile.CountSuits();
int oneRunMaxExtraSuits = ExtraSuits(GetNumberOfSpacesLeft());
HoldingStack.Clear();
if (oneRunSuits - 1 > oneRunMaxExtraSuits)
{
oneRunSuits -= FindHolding(WorkingTableau, HoldingStack, false, oneRunPile, oneRun, 0, oneRunPile.Count, target, oneRunMaxExtraSuits);
if (oneRunSuits - 1 > oneRunMaxExtraSuits)
{
// Not enough spaces and/or holding piles.
return(false);
}
}
// Handle the messy cases.
if (Offload.IsEmpty || Offload.SinglePile && FindTableau.GetDownCount(oneRun) == 0)
{
// Save working state.
SaveWorkingState();
// Found a home for the one run pile.
AddSupplementaryMove(new Move(oneRun, 0, target), oneRunPile, HoldingStack.Set, true);
if (AddMove(order + GetOrder(targetCard, oneRunRootCard)))
{
return(true);
}
// Restore working state.
RestoreWorkingState();
}
return(false);
}
public void Find()
{
Candidates.Clear();
SupplementaryList.Clear();
int numberOfSpaces = FindTableau.NumberOfSpaces;
int maxExtraSuits = ExtraSuits(numberOfSpaces);
int maxExtraSuitsToSpace = ExtraSuits(numberOfSpaces - 1);
for (int from = 0; from < NumberOfPiles; from++)
{
HoldingStack holdingStack = HoldingStacks[from];
Pile fromPile = FindTableau[from];
holdingStack.Clear();
holdingStack.StartingRow = fromPile.Count;
int extraSuits = 0;
for (int fromRow = fromPile.Count - 1; fromRow >= 0; fromRow--)
{
Card fromCard = fromPile[fromRow];
if (fromCard.IsEmpty)
{
break;
}
if (fromRow < fromPile.Count - 1)
{
Card previousCard = fromPile[fromRow + 1];
if (!previousCard.IsSourceFor(fromCard))
{
break;
}
if (fromCard.Suit != previousCard.Suit)
{
// This is a cross-suit run.
extraSuits++;
if (extraSuits > maxExtraSuits + holdingStack.Suits)
{
break;
}
}
}
// Add moves to other piles.
if (fromCard.Face < Face.King)
{
PileList piles = FaceLists[(int)fromCard.Face + 1];
for (int i = 0; i < piles.Count; i++)
{
for (int count = 0; count <= holdingStack.Count; count++)
{
HoldingSet holdingSet = new HoldingSet(holdingStack, count);
if (extraSuits > maxExtraSuits + holdingSet.Suits)
{
continue;
}
int to = piles[i];
if (from == to || holdingSet.Contains(from))
{
continue;
}
// We've found a legal move.
Pile toPile = FindTableau[to];
Algorithm.ProcessCandidate(new Move(from, fromRow, to, toPile.Count, AddHolding(holdingSet)));
// Update the holding pile move.
int holdingSuits = extraSuits;
if (fromRow > 0 && (!fromPile[fromRow - 1].IsTargetFor(fromCard) || fromCard.Suit != fromPile[fromRow - 1].Suit))
{
holdingSuits++;
}
if (holdingSuits > holdingStack.Suits)
{
int length = holdingStack.FromRow - fromRow;
holdingStack.Push(new HoldingInfo(from, fromRow, to, holdingSuits, length));
}
break;
}
}
}
// Add moves to an space.
for (int i = 0; i < FindTableau.NumberOfSpaces; i++)
{
int to = FindTableau.Spaces[i];
if (fromRow == 0)
{
// No point in moving from a full pile
// from one open position to another unless
// there are more cards to turn over.
if (FindTableau.GetDownCount(from) == 0)
{
continue;
}
}
else
{
// No point in moving anything less than
// as much as possible to an space.
Card nextCard = fromPile[fromRow - 1];
if (fromCard.Suit == nextCard.Suit)
{
if (nextCard.IsTargetFor(fromCard))
{
continue;
}
}
}
for (int count = 0; count <= holdingStack.Count; count++)
{
HoldingSet holdingSet = new HoldingSet(holdingStack, count);
if (holdingSet.FromRow == fromRow)
{
// No cards left to move.
continue;
}
if (extraSuits > maxExtraSuitsToSpace + holdingSet.Suits)
{
// Not enough spaces.
continue;
}
// We've found a legal move.
Pile toPile = FindTableau[to];
Algorithm.ProcessCandidate(new Move(from, fromRow, to, toPile.Count, AddHolding(holdingSet)));
break;
}
// Only need to check the first space
// since all spaces are the same
// except for undealt cards.
break;
}
}
}
}
private void CheckOffload(int to)
{
if (Offload.IsEmpty)
{
// No offload to check.
return;
}
Pile offloadPile = WorkingTableau[Offload.To];
if (offloadPile.Count == 0)
{
// A discard emptied the offload pile.
Offload = OffloadInfo.Empty;
return;
}
Card offloadRootCard = offloadPile[0];
int offloadSuits = offloadPile.CountSuits();
int offloadMaxExtraSuits = ExtraSuits(GetNumberOfSpacesLeft());
MoveType offloadType = Offload.SinglePile ? MoveType.Basic : MoveType.Reload;
// Check whether offload matches from pile.
Card fromCard = WorkingTableau.GetCard(from);
if (offloadRootCard.IsSourceFor(fromCard))
{
// Check whether we can make the move.
bool canMove = true;
HoldingStack.Clear();
if (Offload.SinglePile && offloadSuits - 1 > offloadMaxExtraSuits)
{
// Not enough spaces.
offloadSuits -= FindHolding(WorkingTableau, HoldingStack, false, offloadPile, Offload.To, 0, offloadPile.Count, from, offloadMaxExtraSuits);
if (offloadSuits - 1 > offloadMaxExtraSuits)
{
// Not enough spaces and/or holding piles.
canMove = false;
}
}
if (canMove)
{
// Save working state.
SaveWorkingState();
// Offload matches from pile.
AddSupplementaryMove(new Move(offloadType, Offload.To, 0, from), offloadPile, HoldingStack.Set, true);
// Add the intermediate move.
AddMove(order + GetOrder(fromCard, offloadRootCard));
// Restore working state.
RestoreWorkingState();
}
}
// Check whether offoad matches to pile.
Card toCard = WorkingTableau.GetCard(to);
if (offloadRootCard.IsSourceFor(toCard))
{
// Check whether we can make the move.
bool canMove = true;
HoldingStack.Clear();
if (Offload.SinglePile && offloadSuits - 1 > offloadMaxExtraSuits)
{
// Not enough spaces.
offloadSuits -= FindHolding(WorkingTableau, HoldingStack, false, offloadPile, Offload.To, 0, offloadPile.Count, to, offloadMaxExtraSuits);
if (offloadSuits - 1 > offloadMaxExtraSuits)
{
// Not enough spaces and/or holding piles.
canMove = false;
}
}
if (canMove)
{
// Record the order improvement.
order += GetOrder(toCard, offloadRootCard);
// Found a home for the offload.
AddSupplementaryMove(new Move(offloadType, Offload.To, 0, to), offloadPile, HoldingStack.Set, true);
// Update the state.
Offload = OffloadInfo.Empty;
}
}
}
private void CheckOne(Move uncoveringMove)
{
// Prepare data structures.
order = 0;
int runs = Roots.Count - 1;
Offload = OffloadInfo.Empty;
SupplementaryMoves.Clear();
// Initialize the pile map.
WorkingTableau.Clear();
WorkingTableau.CopyUpPiles(FindTableau);
WorkingTableau.BlockDownPiles(FindTableau);
if (!uncoveringMove.IsEmpty)
{
// Update the map for the uncovering move but don't
// include its order contribution so we don't make
// the uncovering move unless it is really necessary.
MoveStack.Clear();
for (int next = uncoveringMove.HoldingNext; next != -1; next = SupplementaryList[next].Next)
{
Move holdingMove = SupplementaryList[next];
Move forwardMove = new Move(MoveType.Basic, MoveFlags.Holding, holdingMove.From, holdingMove.FromRow, holdingMove.To);
SupplementaryMoves.Add(forwardMove);
WorkingTableau.Move(forwardMove);
MoveStack.Push(new Move(MoveType.Basic, MoveFlags.UndoHolding, holdingMove.To, -holdingMove.ToRow, uncoveringMove.To));
}
SupplementaryMoves.Add(uncoveringMove);
WorkingTableau.Move(uncoveringMove);
while (MoveStack.Count > 0)
{
Move holdingMove = MoveStack.Pop();
if (!WorkingTableau.IsValid(holdingMove))
{
break;
}
SupplementaryMoves.Add(holdingMove);
WorkingTableau.Move(holdingMove);
}
}
// Check all the roots.
int offloads = 0;
for (int n = 1; n < Roots.Count; n++)
{
int rootRow = Roots[n];
Card rootCard = fromPile[rootRow];
int runLength = Roots[n - 1] - Roots[n];
int suits = fromPile.CountSuits(rootRow, rootRow + runLength);
int maxExtraSuits = ExtraSuits(GetNumberOfSpacesLeft());
bool suitsMatch = false;
HoldingStack.Clear();
// Try to find the best matching target.
int to = -1;
for (int i = 0; i < NumberOfPiles; i++)
{
if (i == from)
{
continue;
}
Card card = WorkingTableau.GetCard(i);
if (card.IsTargetFor(rootCard))
{
if (!Offload.IsEmpty && to == Offload.To)
{
to = -1;
suitsMatch = false;
}
if (!suitsMatch && card.Suit == rootCard.Suit)
{
to = i;
suitsMatch = true;
}
else if (to == -1)
{
to = i;
}
}
}
MoveType type = MoveType.Basic;
bool isOffload = false;
if (to != -1)
{
// Check for inverting.
if (!Offload.IsEmpty && to == Offload.To)
{
if (!Offload.SinglePile)
{
// Not enough spaces to invert.
return;
}
}
// Try to move this run.
if (suits - 1 > maxExtraSuits)
{
// Try using holding piles.
suits -= FindHolding(WorkingTableau, HoldingStack, false, fromPile, from, rootRow, rootRow + runLength, to, maxExtraSuits);
if (suits - 1 > maxExtraSuits)
{
// Not enough spaces.
return;
}
}
// Record the order improvement.
order += GetOrder(true, suitsMatch);
}
else
{
if (!Offload.IsEmpty)
{
// Already have an offload.
return;
}
// It doesn't make sense to offload the last root.
if (rootRow == 0)
{
if (runs - 1 >= 2)
{
AddMove(order);
}
return;
}
// Check for partial offload.
if (offloads > 0)
{
AddMove(order);
}
// Try to offload this run.
if (GetNumberOfSpacesLeft() == 0)
{
// Not enough spaces.
return;
}
to = WorkingTableau.Spaces[0];
int maxExtraSuitsOnePile = ExtraSuits(GetNumberOfSpacesLeft() - 1) + 1;
if (suits > maxExtraSuitsOnePile)
{
// Try using holding piles.
suits -= FindHolding(WorkingTableau, HoldingStack, false, fromPile, from, rootRow, rootRow + runLength, to, maxExtraSuits);
if (suits > maxExtraSuits)
{
// Still not enough spaces.
return;
}
}
int numberOfSpacesUsed = SpacesUsed(GetNumberOfSpacesLeft(), suits);
Offload = new OffloadInfo(to, numberOfSpacesUsed);
type = Offload.SinglePile ? MoveType.Basic : MoveType.Unload;
isOffload = true;
offloads++;
}
// Do the move and the holding moves.
HoldingSet holdingSet = HoldingStack.Set;
bool undoHolding = !isOffload;
AddSupplementaryMove(new Move(type, from, rootRow, to), fromPile, holdingSet, undoHolding);
// Check whether the offload matches the new from or to piles.
if (!isOffload)
{
CheckOffload(to);
}
// Check whether any of the one run piles now match
// the new from or to piles.
for (int i = 0; i < OneRunPiles.Count; i++)
{
if (CheckOneRun(to, OneRunPiles[i]))
{
// Found an emptying move.
return;
}
}
}
// Check for unload that needs to be reloaded.
if (!Offload.IsEmpty && !Offload.SinglePile)
{
if (FindTableau.GetDownCount(from) != 0)
{
// Can't reload.
return;
}
else
{
// Reload the offload onto the now empty space.
SupplementaryMoves.Add(new Move(MoveType.Reload, Offload.To, 0, from, 0));
}
}
// Add the move.
AddMove(order);
}