public void GetValidPawnMoves(EChessTeam team, int pos, List <Move> moves)
{
int FrontPos = -1, LeftFrontPos = -1, RightFrontPos = -1;
if (team == EChessTeam.White)
{
FrontPos = new BoardPos(pos).GetTop();
if (FrontPos > 0)
{
LeftFrontPos = new BoardPos(FrontPos).GetLeft();
RightFrontPos = new BoardPos(FrontPos).GetRight();
}
if (new BoardPos(pos).Y == 1)
{
AddMoveIfValidSquare(team, pos, new BoardPos(FrontPos).GetTop(), moves, (int)ETeamFlag.None);
}
}
else
{
FrontPos = new BoardPos(pos).GetBottom();
if (FrontPos > 0)
{
LeftFrontPos = new BoardPos(FrontPos).GetRight();
RightFrontPos = new BoardPos(FrontPos).GetLeft();
}
if (new BoardPos(pos).Y == 6)
{
AddMoveIfValidSquare(team, pos, new BoardPos(FrontPos).GetBottom(), moves, (int)ETeamFlag.None);
}
}
AddMoveIfValidSquare(team, pos, FrontPos, moves, (int)ETeamFlag.None);
AddMoveIfValidSquare(team, pos, LeftFrontPos, moves, (int)ETeamFlag.Enemy);
AddMoveIfValidSquare(team, pos, RightFrontPos, moves, (int)ETeamFlag.Enemy);
}
public void GetValidMoves(EChessTeam team, List <Move> moves)
{
for (int i = 0; i < BOARD_SIZE * BOARD_SIZE; ++i)
{
if (Squares[i].Team == team)
{
switch (Squares[i].Piece)
{
case EPieceType.King: GetValidKingMoves(team, i, moves); break;
case EPieceType.Queen: GetValidQueenMoves(team, i, moves); break;
case EPieceType.Pawn: GetValidPawnMoves(team, i, moves); break;
case EPieceType.Rook: GetValidRookMoves(team, i, moves); break;
case EPieceType.Bishop: GetValidBishopMoves(team, i, moves); break;
case EPieceType.Knight: GetValidKnightMoves(team, i, moves); break;
default: break;
}
}
}
}
public void PlayTurn(Move move)
{
if (boardState.IsValidMove(teamTurn, move))
{
boardState.PlayUnsafeMove(move);
EChessTeam otherTeam = (teamTurn == EChessTeam.White) ? EChessTeam.Black : EChessTeam.White;
if (boardState.DoesTeamLose(otherTeam))
{
scores[(int)teamTurn]++;
if (OnScoreUpdated != null)
{
OnScoreUpdated(scores[0], scores[1]);
}
PrepareGame(false);
}
else
{
teamTurn = otherTeam;
}
// raise event
if (OnPlayerTurn != null)
{
OnPlayerTurn(teamTurn == EChessTeam.White);
}
}
}
public bool IsValidMove(EChessTeam team, Move move)
{
List <Move> validMoves = new List <Move>();
GetValidMoves(team, validMoves);
return(validMoves.Contains(move));
}
public void PromoteTo(int pos, EPieceType piece)
{
EChessTeam color = GetColorFromPos(pos);
PieceData data = GetPieceFromPos(pos, color);
SetBitValue(EPieceTypeToBitBoardIndex(data.piece, color), pos, false);
SetBitValue(EPieceTypeToBitBoardIndex(piece, color), pos, true);
}
public BitBoardIndex GetBitBoardIndex(EChessTeam team, EPieceType piece)
{
if (team == EChessTeam.None)
{
return(BitBoardIndex.NONE);
}
return(EPieceTypeToBitBoardIndex(piece, team));
}
public void AddMoveIfValidSquare(EChessTeam team, int from, int to, List <Move> moves, int teamFlag = (int)ETeamFlag.Enemy | (int)ETeamFlag.None)
{
if (IsValidSquare(to, team, teamFlag))
{
Move move;
move.From = from;
move.To = to;
moves.Add(move);
}
}
public void SetPieceAtSquare(int index, EChessTeam team, EPieceType piece)
{
BitBoard.BitBoardIndex tmpIndex = bitBoard.GetBitBoardIndex(team, piece);
if (tmpIndex != BitBoard.BitBoardIndex.NONE)
{
bitBoard.SetBitValue(tmpIndex, index, true);
}
bitBoard.SetBitValue(BitBoard.BitBoardIndex.FREE_CASE, index, false);
bitBoard.SetBitValue(BitBoard.BitBoardIndex.OCCUPED_CASE, index, true);
}
public void GetValidKingMoves(EChessTeam team, int pos, List <Move> moves)
{
AddMoveIfValidSquare(team, pos, (new BoardPos(pos) + new BoardPos(1, 0)), moves);
AddMoveIfValidSquare(team, pos, (new BoardPos(pos) + new BoardPos(1, 1)), moves);
AddMoveIfValidSquare(team, pos, (new BoardPos(pos) + new BoardPos(0, 1)), moves);
AddMoveIfValidSquare(team, pos, (new BoardPos(pos) + new BoardPos(-1, 1)), moves);
AddMoveIfValidSquare(team, pos, (new BoardPos(pos) + new BoardPos(-1, 0)), moves);
AddMoveIfValidSquare(team, pos, (new BoardPos(pos) + new BoardPos(-1, -1)), moves);
AddMoveIfValidSquare(team, pos, (new BoardPos(pos) + new BoardPos(0, -1)), moves);
AddMoveIfValidSquare(team, pos, (new BoardPos(pos) + new BoardPos(1, -1)), moves);
}
// approximation : opponent king must be "eaten" to win instead of detecting checkmate state
public bool DoesTeamLose(EChessTeam team)
{
for (int i = 0; i < Squares.Count; ++i)
{
if (Squares[i].Team == team && Squares[i].Piece == EPieceType.King)
{
return(false);
}
}
return(true);
}
public List <PieceData> GetAllPiecesListOfColor(EChessTeam team)
{
switch (team)
{
case EChessTeam.White: return(GetAllWhitePieceslist());
case EChessTeam.Black: return(GetAllBlackPiecesList());
default: throw new ArgumentException("team: ", team.ToString(), null);
}
}
public BitBoardIndex EPieceTypeToBitBoardIndex(EPieceType piece, EChessTeam team)
{
if (team == EChessTeam.None)
{
throw new ArgumentException("team", team.ToString());
}
string s_team = (team == EChessTeam.White) ? "WHITE_" : "BLACK_";
s_team += piece.ToString();
return((BitBoardIndex)Enum.Parse(typeof(BitBoardIndex), s_team.ToUpper(), true));
}
public bool IsValidSquare(int pos, EChessTeam team, int teamFlag)
{
if (pos < 0)
{
return(false);
}
PieceData data = bitBoard.GetPieceFromPos(pos);
bool isTeamValid = (data.team == EChessTeam.None && ((teamFlag & (int)ETeamFlag.None) > 0)) ||
((data.team != team && data.team != EChessTeam.None) && ((teamFlag & (int)ETeamFlag.Enemy) > 0));
return(isTeamValid);
}
public bool IsValidSquare(int pos, EChessTeam team, int teamFlag)
{
if (pos < 0)
{
return(false);
}
bool isTeamValid = ((Squares[pos].Team == EChessTeam.None) && ((teamFlag & (int)ETeamFlag.None) > 0)) ||
((Squares[pos].Team != team && Squares[pos].Team != EChessTeam.None) && ((teamFlag & (int)ETeamFlag.Enemy) > 0));
return(isTeamValid);
}
private void SetPieceAtSquare(int index, EChessTeam team, EPieceType piece)
{
if (index > Squares.Count)
{
return;
}
BoardSquare square = Squares[index];
square.Piece = piece;
square.Team = team;
Squares[index] = square;
}
public bool DoesTeamLoseForCustomBoard(EChessTeam team, BoardState tmpBoard)
{
BitBoard.BitBoardIndex index = tmpBoard.bitBoard.EPieceTypeToBitBoardIndex(EPieceType.King, team);
int idx = 0;
int iterator = 0;
tmpBoard.bitBoard.FindFirstSetBit(tmpBoard.bitBoard.GetBitBoard(index), ref idx, ref iterator);
if (idx != -1)
{
return(false);
}
return(true);
}
public PieceData GetPieceFromPos(int pos, EChessTeam team)
{
switch (team)
{
case EChessTeam.White: return(GetWhitePieceFromPos(pos));
case EChessTeam.Black: return(GetBlackPieceFromPos(pos));
case EChessTeam.None: return(new PieceData(EPieceType.None, EChessTeam.None, pos));
default: throw new ArgumentException("team", team.ToString(), null);
}
}
// approximation : opponent king must be "eaten" to win instead of detecting checkmate state
public bool DoesTeamLose(EChessTeam team)
{
BitBoard.BitBoardIndex index = bitBoard.EPieceTypeToBitBoardIndex(EPieceType.King, team);
int idx = 0;
int iterator = 0;
bitBoard.FindFirstSetBit(bitBoard.GetBitBoard(index), ref idx, ref iterator);
if (idx != -1)
{
return(false);
}
return(true);
}
public void GetValidKnightMoves(EChessTeam team, int pos, List <Move> moves)
{
AddMoveIfValidSquare(team, pos, new BoardPos(pos) + new BoardPos(1, 2), moves);
AddMoveIfValidSquare(team, pos, new BoardPos(pos) + new BoardPos(2, 1), moves);
AddMoveIfValidSquare(team, pos, new BoardPos(pos) + new BoardPos(-1, 2), moves);
AddMoveIfValidSquare(team, pos, new BoardPos(pos) + new BoardPos(-2, 1), moves);
AddMoveIfValidSquare(team, pos, new BoardPos(pos) + new BoardPos(1, -2), moves);
AddMoveIfValidSquare(team, pos, new BoardPos(pos) + new BoardPos(2, -1), moves);
AddMoveIfValidSquare(team, pos, new BoardPos(pos) + new BoardPos(-1, -2), moves);
AddMoveIfValidSquare(team, pos, new BoardPos(pos) + new BoardPos(-2, -1), moves);
}
public void GetValidRookMoves(EChessTeam team, int pos, List <Move> moves)
{
bool bBreak = false;
int TopPos = new BoardPos(pos).GetTop();
while (!bBreak && TopPos >= 0 && bitBoard.GetPieceFromPos(TopPos).team != team)
{
AddMoveIfValidSquare(team, pos, TopPos, moves);
bBreak = bitBoard.GetPieceFromPos(TopPos).team != EChessTeam.None;
TopPos = new BoardPos(TopPos).GetTop();
}
bBreak = false;
int BottomPos = new BoardPos(pos).GetBottom();
while (!bBreak && BottomPos >= 0 && bitBoard.GetPieceFromPos(BottomPos).team != team)
{
AddMoveIfValidSquare(team, pos, BottomPos, moves);
bBreak = bitBoard.GetPieceFromPos(BottomPos).team != EChessTeam.None;
BottomPos = new BoardPos(BottomPos).GetBottom();
}
bBreak = false;
int LeftPos = new BoardPos(pos).GetLeft();
while (!bBreak && LeftPos >= 0 && bitBoard.GetPieceFromPos(LeftPos).team != team)
{
AddMoveIfValidSquare(team, pos, LeftPos, moves);
bBreak = bitBoard.GetPieceFromPos(LeftPos).team != EChessTeam.None;
LeftPos = new BoardPos(LeftPos).GetLeft();
}
bBreak = false;
int RightPos = new BoardPos(pos).GetRight();
while (!bBreak && RightPos >= 0 && bitBoard.GetPieceFromPos(RightPos).team != team)
{
AddMoveIfValidSquare(team, pos, RightPos, moves);
bBreak = bitBoard.GetPieceFromPos(RightPos).team != EChessTeam.None;
RightPos = new BoardPos(RightPos).GetRight();
}
}
public void GetValidBishopMoves(EChessTeam team, int pos, List <Move> moves)
{
bool bBreak = false;
int TopRightPos = new BoardPos(pos) + new BoardPos(1, 1);
while (!bBreak && TopRightPos >= 0 && bitBoard.GetPieceFromPos(TopRightPos).team != team)
{
AddMoveIfValidSquare(team, pos, TopRightPos, moves);
bBreak = bitBoard.GetPieceFromPos(TopRightPos).team != EChessTeam.None;
TopRightPos = new BoardPos(TopRightPos) + new BoardPos(1, 1);
}
bBreak = false;
int TopLeftPos = new BoardPos(pos) + new BoardPos(-1, 1);
while (!bBreak && TopLeftPos >= 0 && bitBoard.GetPieceFromPos(TopLeftPos).team != team)
{
AddMoveIfValidSquare(team, pos, TopLeftPos, moves);
bBreak = bitBoard.GetPieceFromPos(TopLeftPos).team != EChessTeam.None;
TopLeftPos = new BoardPos(TopLeftPos) + new BoardPos(-1, 1);
}
bBreak = false;
int BottomRightPos = new BoardPos(pos) + new BoardPos(1, -1);
while (!bBreak && BottomRightPos >= 0 && bitBoard.GetPieceFromPos(BottomRightPos).team != team)
{
AddMoveIfValidSquare(team, pos, BottomRightPos, moves);
bBreak = bitBoard.GetPieceFromPos(BottomRightPos).team != EChessTeam.None;
BottomRightPos = new BoardPos(BottomRightPos) + new BoardPos(1, -1);
}
bBreak = false;
int BottomLeftPos = new BoardPos(pos) + new BoardPos(-1, -1);
while (!bBreak && BottomLeftPos >= 0 && bitBoard.GetPieceFromPos(BottomLeftPos).team != team)
{
AddMoveIfValidSquare(team, pos, BottomLeftPos, moves);
bBreak = bitBoard.GetPieceFromPos(BottomLeftPos).team != EChessTeam.None;
BottomLeftPos = new BoardPos(BottomLeftPos) + new BoardPos(-1, -1);
}
}
public void PrepareGame(bool resetScore = true)
{
chessAI = ChessAI.Instance;
// Start game
boardState.Reset();
teamTurn = EChessTeam.White;
if (scores == null)
{
scores = new List <uint>();
scores.Add(0);
scores.Add(0);
}
if (resetScore)
{
scores.Clear();
scores.Add(0);
scores.Add(0);
}
}
public void MovePiece(Move move)
{
EChessTeam color = GetColorFromPos(move.From);
PieceData pieceFrom = GetPieceFromPos(move.From, color);
color = GetColorFromPos(move.To);
PieceData pieceTo = GetPieceFromPos(move.To, color);
SetBitValue(EPieceTypeToBitBoardIndex(pieceFrom.piece, pieceFrom.team), pieceTo.pos, true);
SetBitValue(EPieceTypeToBitBoardIndex(pieceFrom.piece, pieceFrom.team), pieceFrom.pos, false);
if (pieceFrom.team == EChessTeam.White)
{
SetBitValue(FullColorBitBoard.WHITE_PIECES, pieceFrom.pos, false);
SetBitValue(FullColorBitBoard.WHITE_PIECES, pieceTo.pos, true);
}
else if (pieceFrom.team == EChessTeam.Black)
{
SetBitValue(FullColorBitBoard.BLACK_PIECES, pieceFrom.pos, false);
SetBitValue(FullColorBitBoard.BLACK_PIECES, pieceTo.pos, true);
}
if (color != EChessTeam.None)
{
SetBitValue(EPieceTypeToBitBoardIndex(pieceTo.piece, pieceTo.team), pieceTo.pos, false);
if (pieceTo.team == EChessTeam.White)
{
SetBitValue(FullColorBitBoard.WHITE_PIECES, pieceTo.pos, false);
}
else if (pieceFrom.team == EChessTeam.Black)
{
SetBitValue(FullColorBitBoard.BLACK_PIECES, pieceTo.pos, false);
}
}
SetBitValue(BitBoardIndex.FREE_CASE, pieceFrom.pos, true);
SetBitValue(BitBoardIndex.FREE_CASE, pieceTo.pos, false);
SetBitValue(BitBoardIndex.OCCUPED_CASE, pieceFrom.pos, false);
SetBitValue(BitBoardIndex.OCCUPED_CASE, pieceTo.pos, true);
}
public int Evaluate(EChessTeam team)
{
if (team == EChessTeam.None)
{
throw new ArgumentException("team: ", team.ToString(), null);
}
int score;
int otherTeamScore;
List <PieceData> currentTeamData = GetAllPiecesListOfColor(team);
EvaluateTeam(currentTeamData, out score);
EChessTeam otherTeam = (team == EChessTeam.White) ? EChessTeam.Black : EChessTeam.White;
List <PieceData> otherTeamData = GetAllPiecesListOfColor(otherTeam);
EvaluateTeam(otherTeamData, out otherTeamScore);
int tmpScore = 189 - otherTeamScore;
return(score + Mathf.Abs(tmpScore));
}
public void PlayTurn(Move move)
{
if (boardState.IsValidMove(teamTurn, move))
{
if (boardState.PlayUnsafeMove(move))
{
// promote pawn to queen
AddQueenAtPos(move.To);
}
EChessTeam otherTeam = (teamTurn == EChessTeam.White) ? EChessTeam.Black : EChessTeam.White;
if (boardState.DoesTeamLose(otherTeam))
{
// increase score and reset board
scores[(int)teamTurn]++;
if (OnScoreUpdated != null)
{
OnScoreUpdated(scores[0], scores[1]);
}
PrepareGame(false);
// remove extra piece instances if pawn promotions occured
teamPiecesArray[0].ClearPromotedPieces();
teamPiecesArray[1].ClearPromotedPieces();
}
else
{
teamTurn = otherTeam;
}
// raise event
if (OnPlayerTurn != null)
{
OnPlayerTurn(teamTurn == EChessTeam.White);
}
}
}
public void GetValidPawnMoves(EChessTeam team, int pos, List <Move> moves)
{
int FrontPos = -1, LeftFrontPos = -1, RightFrontPos = -1;
if (team == EChessTeam.White)
{
FrontPos = new BoardPos(pos).GetTop();
if (FrontPos != -1)
{
LeftFrontPos = new BoardPos(FrontPos).GetLeft();
RightFrontPos = new BoardPos(FrontPos).GetRight();
}
if (new BoardPos(pos).Y == 1 && bitBoard.GetPieceFromPos(pos + BOARD_SIZE).piece == EPieceType.None)
{
AddMoveIfValidSquare(team, pos, new BoardPos(FrontPos).GetTop(), moves, (int)ETeamFlag.None);
}
}
else
{
FrontPos = new BoardPos(pos).GetBottom();
if (FrontPos != -1)
{
RightFrontPos = new BoardPos(FrontPos).GetLeft();
LeftFrontPos = new BoardPos(FrontPos).GetRight();
}
if (new BoardPos(pos).Y == 6 && bitBoard.GetPieceFromPos(pos - BOARD_SIZE).piece == EPieceType.None)
{
AddMoveIfValidSquare(team, pos, new BoardPos(FrontPos).GetBottom(), moves, (int)ETeamFlag.None);
}
}
AddMoveIfValidSquare(team, pos, FrontPos, moves, (int)ETeamFlag.None);
AddMoveIfValidSquare(team, pos, LeftFrontPos, moves, (int)ETeamFlag.Enemy);
AddMoveIfValidSquare(team, pos, RightFrontPos, moves, (int)ETeamFlag.Enemy);
}
public void GetValidMoves(EChessTeam team, List <Move> moves)
{
List <PieceData> pieceDatas = bitBoard.GetAllPiecesListOfColor(team);
foreach (PieceData data in pieceDatas)
{
switch (data.piece)
{
case EPieceType.King: GetValidKingMoves(team, data.pos, moves); break;
case EPieceType.Queen: GetValidQueenMoves(team, data.pos, moves); break;
case EPieceType.Pawn: GetValidPawnMoves(team, data.pos, moves); break;
case EPieceType.Rook: GetValidRookMoves(team, data.pos, moves); break;
case EPieceType.Bishop: GetValidBishopMoves(team, data.pos, moves); break;
case EPieceType.Knight: GetValidKnightMoves(team, data.pos, moves); break;
default: break;
}
}
}
public uint GetScore(EChessTeam team)
{
return(scores[(int)team]);
}
public void MakeMove(EChessTeam currentTeam, Move move, BoardState currentBoard)
{
currentBoard.bitBoard.MovePiece(move);
}
public int Evaluate(EChessTeam team, BoardState currentBoard)
{
return(currentBoard.bitBoard.Evaluate(team));
}