/// <summary>
/// Checks to see if a square is next to a corner
/// </summary>
/// <param name="square"></param>
/// <param name="board"></param>
/// <returns></returns>
public bool IsNextToCorner(SimpleSquare square, SimpleBoard board)
{
int sizeX = board.OccupationArray.GetLength(0);
int sizeY = board.OccupationArray.GetLength(1);
int posX = square.Column;
int posY = square.Row;
if (posX == 0 && posY == 1)
{
return(true);
}
if (posX == 1 && posY == 0)
{
return(true);
}
if (posX == 0 && posY == sizeY - 2)
{
return(true);
}
if (posX == 1 && posY == sizeY - 1)
{
return(true);
}
if (posX == sizeX - 2 && posY == 0)
{
return(true);
}
if (posX == sizeX - 1 && posY == 1)
{
return(true);
}
if (posX == sizeX - 2 && posY == sizeY - 1)
{
return(true);
}
if (posX == sizeX - 1 && posY == sizeY - 2)
{
return(true);
}
return(false);
}
public List <Move> Evaluate(List <List <Move> > inputMoveList, TurnState currentTurnState)
{
moveList = inputMoveList;
List <Move> suggestedMoves = new List <Move>();
if (currentTurnState == TurnState.Defender)
{
SimpleSquare evalSquare = new SimpleSquare();
bool foundWin = false;
//Evaluate the if the King's path to the thrones is clear. If so one of the moves will have the King on the throne.
moveList[0].ForEach((item) =>
{
evalSquare = item.GetSquare(item.endRow, item.endColumn);
if (evalSquare.SquareType == Square.square_type.Corner)
{
item.scoreKingsCouncil = desireToWin;
suggestedMoves.Add(item);
foundWin = true;
}
});
if (foundWin)
{
return(suggestedMoves);
}
int numMovesForKing = 0;
List <Move> tempMoveList = new List <Move>();
List <Move> kingsMoveList = new List <Move>();
List <Move> winningKingMoveList = new List <Move>();
SimpleSquare kingSquare = new SimpleSquare();
int numberDepth2Wins = 0;
int sizeX = moveList[0][0].board.OccupationArray.GetLength(0) - 1;
int sizeY = moveList[0][0].board.OccupationArray.GetLength(1) - 1;
//Look at all depth 2 moves (generated from move[0]'s) to see if any of these are wins. Don't just iterate over all depth[2] as this would
//include depth [1] moves by attacker moving out of the way...
//Also Award moves that have the King more free to move
moveList[0].ForEach((item) =>
{
try
{
//Find the King
kingSquare = item.FindTheKing(item.board, true);
tempMoveList = item.board.GetPossibleMoves(TurnState.Defender, null, 0);
//filter the list based on moves of the king
kingsMoveList = tempMoveList.Where(move => move.startRow == kingSquare.Row && move.startColumn == kingSquare.Column).ToList();
numMovesForKing = kingsMoveList.Count;
//Give a bonus for the king being freed up
item.scoreKingsCouncil += (double)numMovesForKing * desireForFreeKing;
winningKingMoveList = kingsMoveList.Where(mov => (mov.endColumn == 0 && mov.endRow == 0) ||
(mov.endColumn == 0 && mov.endRow == sizeY) ||
(mov.endColumn == sizeX && mov.endRow == 0) ||
(mov.endColumn == sizeX && mov.endRow == sizeY)).ToList();
if (winningKingMoveList.Count > 0)
{
numberDepth2Wins++;
item.scoreKingsCouncil += desrieToWinDepth2;
}
}
catch (Exception ex)
{
numberDepth2Wins += 0;
}
});
//if number of depth 2 wins is zero allow more full analyis
if (numberDepth2Wins == 0)
{
moveList[2].ForEach(item =>
{
kingSquare = item.FindTheKing(item.board, true);
Piece king = new Piece(kingSquare.Column, kingSquare.Row, Piece.PieceType.King);
kingsMoveList = item.board.GetMovesForPiece(king, item, 3);
kingsMoveList = kingsMoveList.Where(mov => (mov.endColumn == 0 && mov.endRow == 0) ||
(mov.endColumn == 0 && mov.endRow == sizeY) ||
(mov.endColumn == sizeX && mov.endRow == 0) ||
(mov.endColumn == sizeX && mov.endRow == sizeY)
).ToList();
if (kingsMoveList.Count > 0)
{
item.parent.parent.scoreKingsCouncil += desireForKingToBeClearToCorner / (double)moveList[1].Count;
}
});
}
//return the best
suggestedMoves.Add(moveList[0].MaxObject((item) => item.scoreKingsCouncil));
}
else
{
return(suggestedMoves); //will be empty.
}
return(suggestedMoves);
}
public List <Move> Evaluate(List <List <Move> > inputMoveList, TurnState currentTurnState)
{
List <Move> suggestedMoves = new List <Move>();
//Look to have the outer pieces on the maximum number of rows
DateTime start = DateTime.Now;
DateTime start2 = DateTime.Now;
TimeSpan duration = new TimeSpan();
double runTime = 0.0d;
double runTime2 = 0.0d;
SimpleSquare kingSquare = new SimpleSquare();
List <Move> kingsMoveList = new List <Move>();
int sizeX = inputMoveList[0][0].board.OccupationArray.GetLength(0);
int sizeY = inputMoveList[0][0].board.OccupationArray.GetLength(1);
int numberMovesDepth0 = 0;
int numberOfLosesDepth1 = 0;
bool foundwin = false;
inputMoveList[0].ForEach(item =>
{
if (item.CheckForAttackerVictory())
{
item.scoreAssassin = desireForWinDepth0;
numberMovesDepth0++;
foundwin = true;
}
});
//check to see if a move blocks a depth 1 loss
if (!foundwin)
{
inputMoveList[1].ForEach(item =>
{
//If a loss is possible all moves in which the loss can happen should be penalised.
SimpleSquare kingSquareWin = item.FindTheKing(item.board, true);
if (kingSquareWin.SquareType == Square.square_type.Corner)
{
numberOfLosesDepth1++;
item.parent.scoreAssassin -= desireNotToLoseDepth1;
}
//if the king can get to a square next to a corner it is also a definte loss effectively at depth 3
//so penalise at depth 1
if (IsNextToCorner(kingSquareWin, item.board))
{
numberOfLosesDepth1++;
item.parent.scoreAssassin -= desireNotToLoseDepth1;
}
});
runTime = (DateTime.Now - start).TotalSeconds;
start2 = DateTime.Now;
//Check to see if can win, but not if can lose on next defender move
bool worthLookingDeep = false;
if (numberOfLosesDepth1 < 1)
{
//Check if king is at least surrounded by 2 attackers - if so look for a 2 move combo that might win
inputMoveList[0].ForEach(item =>
{
if (item.NumberOfAttackersAroundKing() >= 2)
{
worthLookingDeep = true;
}
});
if (worthLookingDeep)
{
Parallel.ForEach(inputMoveList[2], item =>
{
if (item.CheckForAttackerVictory())
{
item.parent.parent.scoreAssassin += desireForWinDepth2 / (double)inputMoveList[1].Count;
}
});
}
}
runTime2 = (DateTime.Now - start2).TotalSeconds;
runTime = (DateTime.Now - start).TotalSeconds;
//look for moves of the king at depth 3
//Look for routes for the king at depth 3 to get to corner
sizeX = inputMoveList[0][0].board.OccupationArray.GetLength(0) - 1;
sizeY = inputMoveList[0][0].board.OccupationArray.GetLength(1) - 1;
Object _lock = new Object();
if (numberOfLosesDepth1 < 1)
{
inputMoveList[1].ForEach(item => //This could be moveList[2] but would be slow. This only evolves from the defenders last move (i.e. skips the attackers move)
{
kingSquare = item.FindTheKing(item.board, true);
Piece king = new Piece(kingSquare.Column, kingSquare.Row, Piece.PieceType.King);
kingsMoveList = item.board.GetMovesForPiece(king, item, 3); // This is very expensive
kingsMoveList = kingsMoveList.Where(mov => (mov.endColumn == 0 && mov.endRow == 0) ||
(mov.endColumn == 0 && mov.endRow == sizeY) ||
(mov.endColumn == sizeX && mov.endRow == 0) ||
(mov.endColumn == sizeX && mov.endRow == sizeY)
).ToList();
if (kingsMoveList.Count > 0)
{
item.parent.scoreAssassin -= desireNotToLoseDepth3 / (double)inputMoveList[1].Count;
}
});
}
}
runTime = (DateTime.Now - start).TotalSeconds;
suggestedMoves.Add(inputMoveList[0].MaxObject(item => item.scoreAssassin));
return(suggestedMoves);
}
