/// Returns a list of moves given a pgn string.
/// Note that Board should be set to whatever starting position of pgn is.
public static List <ushort> MovesFromPGN(string pgn)
{
List <string> moveStrings = MoveStringsFromPGN(pgn);
List <ushort> allMoves = new List <ushort> ();
MoveGenerator moveGen = new MoveGenerator();
for (int i = 0; i < moveStrings.Count; i++)
{
string moveString = moveStrings[i];
moveString = moveString.Replace("+", ""); // remove check symbol
moveString = moveString.Replace("#", ""); // remove mate symbol
moveString = moveString.Replace("x", ""); // remove capture symbol
string moveStringLower = moveStrings[i].ToLower();
ushort[] movesInPosition = moveGen.GetMoves(false, false).moves;
ushort move = 0;
for (int j = 0; j < movesInPosition.Length; j++)
{
move = movesInPosition[j];
int moveFromIndex = move & 127;
int moveToIndex = (move >> 7) & 127;
int movePieceType = Board.boardArray[moveFromIndex] & ~1;
int colourCode = Board.boardArray[moveFromIndex] & 1;
if (moveStringLower == "oo") // castle kingside
{
if (movePieceType == Board.kingCode && moveToIndex - moveFromIndex == 2)
{
break;
}
}
else if (moveStringLower == "ooo") // castle queenside
{
if (movePieceType == Board.kingCode && moveToIndex - moveFromIndex == -2)
{
break;
}
}
else if (Definitions.fileNames.Contains(moveString[0] + "")) // pawn move if starts with any file indicator (e.g. 'e'4. Note that uppercase B is used for bishops)
{
if (movePieceType != Board.pawnCode)
{
continue;
}
if (Definitions.FileNumberFromAlgebraicName(moveStringLower[0]) == Board.FileFrom128(moveFromIndex)) // correct starting file
{
if (moveString.Contains("=")) // is promotion
{
char promotionChar = moveStringLower[moveStringLower.Length - 1];
int promotionPieceIndex = move >> 14 & 3;
int promotionPieceCode = Board.pieceCodeArray [promotionPieceIndex];
if ((promotionPieceCode == Board.queenCode && promotionChar != 'q') || (promotionPieceCode == Board.rookCode && promotionChar != 'r') ||
(promotionPieceCode == Board.bishopCode && promotionChar != 'b') || (promotionPieceCode == Board.knightCode && promotionChar != 'n'))
{
continue; // skip this move, incorrect promotion type
}
break;
}
else
{
char targetFile = moveString[moveString.Length - 2];
char targetRank = moveString[moveString.Length - 1];
if (Definitions.FileNumberFromAlgebraicName(targetFile) == Board.FileFrom128(moveToIndex)) // correct ending file
{
if (Definitions.RankNumberFromAlgebraicName(targetRank) == Board.RankFrom128(moveToIndex)) // correct ending rank
{
break;
}
}
}
}
}
else // regular piece move
{
char movePieceChar = moveString[0];
if (!(movePieceType == Board.queenCode && movePieceChar == 'Q') && !(movePieceType == Board.rookCode && movePieceChar == 'R') &&
!(movePieceType == Board.bishopCode && movePieceChar == 'B') && !(movePieceType == Board.knightCode && movePieceChar == 'N') && !(movePieceType == Board.kingCode && movePieceChar == 'K'))
{
continue; // skip this move, incorrect move piece type
}
char targetFile = moveString[moveString.Length - 2];
char targetRank = moveString[moveString.Length - 1];
if (Definitions.FileNumberFromAlgebraicName(targetFile) == Board.FileFrom128(moveToIndex)) // correct ending file
{
if (Definitions.RankNumberFromAlgebraicName(targetRank) == Board.RankFrom128(moveToIndex)) // correct ending rank
{
if (moveString.Length == 4) // addition char present for disambiguation (e.g. Nbd7 or R7e2)
{
char disambiguationChar = moveString[1];
if (Definitions.fileNames.Contains(disambiguationChar + "")) // is file disambiguation
{
if (Definitions.FileNumberFromAlgebraicName(disambiguationChar) != Board.FileFrom128(moveFromIndex)) // incorrect starting file
{
continue;
}
}
else // is rank disambiguation
{
if (Definitions.RankNumberFromAlgebraicName(disambiguationChar) != Board.RankFrom128(moveFromIndex)) // incorrect starting rank
{
continue;
}
}
}
break;
}
}
}
}
if (move == 0) // move is illegal; discard and return moves up to this point
{
UnityEngine.Debug.Log(moveString);
break;
}
else
{
allMoves.Add(move);
}
Board.MakeMove(move);
}
for (int i = allMoves.Count - 1; i >= 0; i--)
{
Board.UnmakeMove(allMoves[i]);
}
return(allMoves);
}
