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main_stuff.R
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main_stuff.R
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chessSim = function(){
resign= 0
par(bg = "grey")
i = 1
colSelect = 0
while(colSelect == 0){
playerCol = readline("Black or White?")
if(playerCol != "White" & playerCol != "Black"){
print("invalid choice")
}
else{
colSelect = 1
}
}
while(nrow(activePieces[activePieces$Type == "King",])>1){
#plot board
if(playerCol == "White"){
plot(1, type="n", xlab="", ylab="", xlim=c(0.5, 8.5), ylim=c(0.5, 8.5), xaxt = "n", yaxt = "n",
main = "Select row number to move, 'O-O' to castle kingside,\n'O-O-O' to castle queenside,
'En Passant' + file letter to take en passant, or 'resign' to stop")
axis(1, at=1:8, labels=letters[1:8])
axis(2, at=1:8, labels=1:8)
}
if(playerCol == "Black"){
plot(1, type="n", xlab="", ylab="", xlim=rev(c(0.5, 8.5)), ylim=rev(c(0.5, 8.5)), xaxt = "n", yaxt = "n",
main = "Select row number to move, 'O-O' to castle kingside, 'O-O-O' to castle queenside,
'En Passant' + file letter to take en passant, or 'resign' to stop")
axis(1, at=1:8, labels=letters[1:8])
axis(2, at=1:8, labels=1:8)
}
for(j in c(1,3,5,7)){
for(k in c(1,3,5,7)){
rect(j-0.5, k - 0.5, j +0.5, k+0.5, col = "darkgrey", border = NA)
}
}
for(l in c(2,4,6,8)){
for(m in c(2,4,6,8)){
rect(l-0.5, m - 0.5, l +0.5, m+0.5, col = "darkgrey", border = NA)
}
}
points(data = activePieces[activePieces$Type == "Queen",], YLoc ~ XLoc,
pch = -0x265B, col = Colour, cex = 3)
points(data = activePieces[activePieces$Type == "King",], YLoc ~ XLoc,
pch = -0x265A, col = Colour, cex = 3)
points(data = activePieces[activePieces$Type == "Rook",], YLoc ~ XLoc,
pch = -0x265C, col = Colour, cex = 3)
points(data = activePieces[activePieces$Type == "Bishop",], YLoc ~ XLoc,
pch = -0x265D, col = Colour, cex = 3)
points(data = activePieces[activePieces$Type == "Night",], YLoc ~ XLoc,
pch = -0x265E, col = Colour, cex = 3)
points(data = activePieces[activePieces$Type == "Pawn",], YLoc ~ XLoc,
pch = -0x265F, col = Colour, cex = 3)
if(is.even(i) == F){pieceCol = "White"
opponent = "Black"}
else{pieceCol = "Black"
opponent = "White"}
evalTable = setNames(data.frame(matrix(ncol = 5, nrow = 0)), c("PieceID", "Move", "NoSpaces", "Points", "Position"))
for(cn in rownames(activePieces[activePieces$Colour == pieceCol,])){
piece = activePieces[match(cn,rownames(activePieces)),]
#pawn possible moves
#when attack is possible
if(piece$Type == "Pawn" & pieceCol == "White"){
multiplier = 1:1
if(nrow(activePieces[activePieces$XLoc == (piece$XLoc + 1) &
activePieces$YLoc == (piece$YLoc + 1) & activePieces$Colour != pieceCol,])==1){
if(piece$Moves == 0){moves = wPMoves[c(1,2,3)]
names(moves) = c(1,2,3)}
else{moves = wPMoves[c(1,3)]
names(moves) = c(1,3)}
}
else if(nrow(activePieces[activePieces$XLoc == (piece$XLoc - 1) &
activePieces$YLoc == (piece$YLoc + 1) & activePieces$Colour != pieceCol,])==1){
if(piece$Moves == 0){moves = wPMoves[c(1,2,4)]
names(moves) = c(1,2,4)} #if first move, move 1 or 2 forwards
else{moves = wPMoves[c(1,4)]
names(moves) = c(1,4)}
}
else{
if(piece$Moves ==0){moves = wPMoves[c(1,2)]
names(moves) = c(1,2)}
else{moves = wPMoves[1]
names(moves) = c(1)
}
}
}
if(piece$Type == "Pawn" & pieceCol == "Black"){
multiplier = 1:1
if(nrow(activePieces[activePieces$XLoc == (piece$XLoc + 1) &
activePieces$YLoc == (piece$YLoc - 1) & activePieces$Colour != pieceCol,])==1){
if(piece$Moves == 0){moves = bPMoves[c(1,2,3)]
names(moves) = c(1,2,3)}
else{moves = bPMoves[c(1,3)]
names(moves) = c(1,3)}
}
else if(nrow(activePieces[activePieces$XLoc == (piece$XLoc - 1) &
activePieces$YLoc == (piece$YLoc - 1) & activePieces$Colour != pieceCol,])==1){
if(piece$Moves == 0){moves = bPMoves[c(1,2,4)]
names(moves) = c(1,2,4)}
else{moves = bPMoves[c(1,4)]
names(moves) = c(1,4)}
}
else{
if(piece$Moves ==0){moves = bPMoves[c(1,2)]
names(moves) = c(1,2)}
else{moves = bPMoves[1]
names(moves) = c(1)}
}
}
if(piece$Type == "Bishop"){moves = BMoves
names(moves) = c(1,2,3,4)
multiplier = 1:8}
if(piece$Type == "Rook"){moves = RMoves
names(moves) = c(1,2,3,4)
multiplier = 1:8}
if(piece$Type == "Night"){moves = NMoves
names(moves) = c(1,2,3,4,5,6,7,8)
multiplier = 1:1}
if(piece$Type == "Queen"){moves = QMoves
names(moves) = c(1,2,3,4,5,6,7,8)
multiplier = 1:8}
if(piece$Type == "King"){moves = KMoves
names(moves) = c(1,2,3,4,5,6,7,8)
multiplier = 1:1}
for(y in as.numeric(names(moves))){
chosenMove = moves[[as.character(y)]]
maxMoves = maxMovesFun(piece, activePieces, pieceCol, chosenMove, multiplier)
if(piece$Type == "Pawn" & piece$Moves > 0 & y == 2){}
else if(maxMoves > 0){
for(e in 1:maxMoves){
evalTable2 = setNames(data.frame(matrix(ncol = 5, nrow = 1)), c("PieceID", "Move", "NoSpaces", "Points", "Position"))
evalTable2$PieceID = cn
evalTable2$Move = y
evalTable2$NoSpaces = e
evalTable2$Points = moveScore(activePieces, piece, pieceCol, opponent, chosenMove, e)
evalTable2$Position = paste(activePieces[match(cn,rownames(activePieces)),]$Type, paste0(letters[activePieces[match(cn,rownames(activePieces)),]$XLoc],
activePieces[match(cn,rownames(activePieces)),]$YLoc), "to",
paste0(letters[activePieces[match(cn,rownames(activePieces)),]$XLoc + chosenMove[1]*e],
activePieces[match(cn,rownames(activePieces)),]$YLoc + chosenMove[2]*e))
evalTable = rbind(evalTable, evalTable2)
}
}
else{}
}
}
if(nrow(evalTable[evalTable$Points > -100,]) == 0 & inCheck(activePieces, pieceCol) == TRUE){
print(paste("CHECKMATE!", opponent,"wins!"))
break()
}
else if(nrow(evalTable[evalTable$Points > -100,]) == 0 & inCheck(activePieces, pieceCol) == FALSE){
print("STALEMATE!")
break()
}
else if(nrow(activePieces) < 3){
print("STALEMATE!")
break()
}
if(pieceCol != playerCol){
evalTable = evalTable[order(-evalTable$Points),]
bestMove = head(evalTable, 1)
if(bestMove$Points == 0){
if(i > 1){
if(activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Type == "Pawn" &
nrow(activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc + 1
& activePieces$YLoc == 4 & activePieces$Type == "Pawn",]) ==1){
if(canEnPassant(activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc + 1
& activePieces$YLoc == 4,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),]) == T){
activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc + 1 & activePieces$YLoc == 4,]$killCount = activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc + 1 & activePieces$YLoc == 4,]$killCount + 1
activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc + 1 & activePieces$YLoc == 4,]$YLoc = 3
activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc + 1 & activePieces$YLoc == 3,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
}
else if(activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Type == "Pawn" &
nrow(activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1
& activePieces$YLoc == 4 & activePieces$Type == "Pawn",]) ==1){
if(canEnPassant(activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1
& activePieces$YLoc == 4,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),]) == T){
activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1 & activePieces$YLoc == 4,]$killCount = activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1 & activePieces$YLoc == 4,]$killCount + 1
activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1 & activePieces$YLoc == 4,]$YLoc = 3
activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1 & activePieces$YLoc == 3,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
}
else if(canCastleKingside(activePieces, pieceCol) == T){
activePieces[activePieces$Type == "King" & activePieces$Colour == "Black",]$XLoc = 7
activePieces[activePieces$Type == "Rook" & activePieces$Colour == "Black" & activePieces$XLoc == 8,]$XLoc = 6
}
else if(canCastleQueenside(activePieces, pieceCol) == T){
activePieces[activePieces$Type == "King" & activePieces$Colour == "Black",]$XLoc = 3
activePieces[activePieces$Type == "Rook" & activePieces$Colour == "Black" & activePieces$XLoc == 1,]$XLoc = 4
}
else{bestMove = evalTable[sample(rownames(evalTable[evalTable$Points == 0,]), 1),]
activePieces = makeMove(activePieces, bestMove, pieceCol)}
}
else if(canCastleKingside(activePieces, pieceCol) == T){
activePieces[activePieces$Type == "King" & activePieces$Colour == "Black",]$XLoc = 7
activePieces[activePieces$Type == "Rook" & activePieces$Colour == "Black" & activePieces$XLoc == 8,]$XLoc = 6
}
else if(canCastleQueenside(activePieces, pieceCol) == T){
activePieces[activePieces$Type == "King" & activePieces$Colour == "Black",]$XLoc = 3
activePieces[activePieces$Type == "Rook" & activePieces$Colour == "Black" & activePieces$XLoc == 1,]$XLoc = 4
}
else{bestMove = evalTable[sample(rownames(evalTable[evalTable$Points == 0,]), 1),]
activePieces = makeMove(activePieces, bestMove, pieceCol)}
}
else if(activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Type == "Pawn" &
nrow(activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1
& activePieces$YLoc == 4 & activePieces$Type == "Pawn",]) ==1){
if(canEnPassant(activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1
& activePieces$YLoc == 4,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),]) == T){
activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1 & activePieces$YLoc == 4,]$killCount = activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1 & activePieces$YLoc == 4,]$killCount + 1
activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1 & activePieces$YLoc == 4,]$YLoc = 3
activePieces[activePieces$XLoc == activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc - 1 & activePieces$YLoc == 3,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
}
else if(canCastleKingside(activePieces, pieceCol) == T){
activePieces[activePieces$Type == "King" & activePieces$Colour == "Black",]$XLoc = 7
activePieces[activePieces$Type == "Rook" & activePieces$Colour == "Black" & activePieces$XLoc == 8,]$XLoc = 6
}
else if(canCastleQueenside(activePieces, pieceCol) == T){
activePieces[activePieces$Type == "King" & activePieces$Colour == "Black",]$XLoc = 3
activePieces[activePieces$Type == "Rook" & activePieces$Colour == "Black" & activePieces$XLoc == 1,]$XLoc = 4
}
else{bestMove = evalTable[sample(rownames(evalTable[evalTable$Points == 0,]), 1),]
activePieces = makeMove(activePieces, bestMove, pieceCol)}
}
else if(canCastleKingside(activePieces, pieceCol) == T){
activePieces[activePieces$Type == "King" & activePieces$Colour == pieceCol,]$XLoc = 7
activePieces[activePieces$Type == "Rook" & activePieces$Colour == pieceCol & activePieces$XLoc == 8,]$XLoc = 6
}
else if(canCastleQueenside(activePieces, pieceCol) == T){
activePieces[activePieces$Type == "King" & activePieces$Colour == pieceCol,]$XLoc = 3
activePieces[activePieces$Type == "Rook" & activePieces$Colour == pieceCol & activePieces$XLoc == 1,]$XLoc = 4
}
else{
pieceToMove = sample(evalTable$PieceID[evalTable$Points == 0], 1)
bestMove = evalTable[sample(rownames(evalTable[evalTable$Points == 0 & evalTable$PieceID == pieceToMove,]), 1),]
activePieces = makeMove(activePieces, bestMove, pieceCol)}
}
else{bestMove = evalTable[sample(rownames(evalTable[evalTable$Points == 0,]), 1),]
activePieces = makeMove(activePieces, bestMove, pieceCol)}
}
else{activePieces = makeMove(activePieces, bestMove, pieceCol)}
}
if(pieceCol == playerCol){
if(i == 1 | i == 2){
print("You play as white")
print("Type the row number of your chosen move")
print("Alternatively, type O-O to castle kingside, O-O-O to castle queenside")
print("Or type En Passant followed by your pawn's file letter to capture En Passant")
print("If you want to quit, type resign")
}
validMove = 0
while(validMove == 0){
print(evalTable[evalTable$Points > -100, c(2,5)])
choice = readline(prompt = "Choose your move (enter rowname)")
if(choice %in% rownames(evalTable[evalTable$Points > -100,]) == T){
bestMove = evalTable[choice,]
activePieces = makeMove(activePieces, bestMove, pieceCol)
validMove = 1
}
####INSERT EN PASSANT STUFF HERE
else if(choice == "En Passant A" &&
canEnPassant(activePieces[activePieces$XLoc == 1 & activePieces$YLoc == 5,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),])){
activePieces[activePieces$XLoc == 1 & activePieces$YLoc == 5,]$killCount = activePieces[activePieces$XLoc == 1 & activePieces$YLoc == 5,]$killCount + 1
activePieces[activePieces$XLoc == 1 & activePieces$YLoc == 5,]$YLoc = 6
activePieces[activePieces$XLoc == 1 & activePieces$YLoc == 6,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
validMove = 1
}
else if(choice == "En Passant B" &&
canEnPassant(activePieces[activePieces$XLoc == 2 & activePieces$YLoc == 5,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),])){
activePieces[activePieces$XLoc == 2 & activePieces$YLoc == 5,]$killCount = activePieces[activePieces$XLoc == 2 & activePieces$YLoc == 5,]$killCount + 1
activePieces[activePieces$XLoc == 2 & activePieces$YLoc == 5,]$YLoc = 6
activePieces[activePieces$XLoc == 2 & activePieces$YLoc == 6,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
validMove = 1
}
else if(choice == "En Passant C" &&
canEnPassant(activePieces[activePieces$XLoc == 3 & activePieces$YLoc == 5,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),])){
activePieces[activePieces$XLoc == 3 & activePieces$YLoc == 5,]$killCount = activePieces[activePieces$XLoc == 3 & activePieces$YLoc == 5,]$killCount + 1
activePieces[activePieces$XLoc == 3 & activePieces$YLoc == 5,]$YLoc = 6
activePieces[activePieces$XLoc == 3 & activePieces$YLoc == 6,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
validMove = 1
}
else if(choice == "En Passant D" &&
canEnPassant(activePieces[activePieces$XLoc == 4 & activePieces$YLoc == 5,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),])){
activePieces[activePieces$XLoc == 4 & activePieces$YLoc == 5,]$killCount = activePieces[activePieces$XLoc == 4 & activePieces$YLoc == 5,]$killCount + 1
activePieces[activePieces$XLoc == 4 & activePieces$YLoc == 5,]$YLoc = 6
activePieces[activePieces$XLoc == 4 & activePieces$YLoc == 6,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
validMove = 1
}
else if(choice == "En Passant E" &&
canEnPassant(activePieces[activePieces$XLoc == 5 & activePieces$YLoc == 5,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),])){
activePieces[activePieces$XLoc == 5 & activePieces$YLoc == 5,]$killCount = activePieces[activePieces$XLoc == 5 & activePieces$YLoc == 5,]$killCount + 1
activePieces[activePieces$XLoc == 5 & activePieces$YLoc == 5,]$YLoc = 6
activePieces[activePieces$XLoc == 5 & activePieces$YLoc == 6,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
validMove = 1
}
else if(choice == "En Passant F" &&
canEnPassant(activePieces[activePieces$XLoc == 6 & activePieces$YLoc == 5,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),])){
activePieces[activePieces$XLoc == 6 & activePieces$YLoc == 5,]$killCount = activePieces[activePieces$XLoc == 6 & activePieces$YLoc == 5,]$killCount + 1
activePieces[activePieces$XLoc == 6 & activePieces$YLoc == 5,]$YLoc = 6
activePieces[activePieces$XLoc == 6 & activePieces$YLoc == 6,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
validMove = 1
}
else if(choice == "En Passant G" &&
canEnPassant(activePieces[activePieces$XLoc == 7 & activePieces$YLoc == 5,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),])){
activePieces[activePieces$XLoc == 7 & activePieces$YLoc == 5,]$killCount = activePieces[activePieces$XLoc == 7 & activePieces$YLoc == 5,]$killCount + 1
activePieces[activePieces$XLoc == 7 & activePieces$YLoc == 5,]$YLoc = 6
activePieces[activePieces$XLoc == 7 & activePieces$YLoc == 6,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
validMove = 1
}
else if(choice == "En Passant H" &&
canEnPassant(activePieces[activePieces$XLoc == 8 & activePieces$YLoc == 5,],
activePieces[match(lastMove$PieceID,rownames(activePieces)),])){
activePieces[activePieces$XLoc == 8 & activePieces$YLoc == 5,]$killCount = activePieces[activePieces$XLoc == 8 & activePieces$YLoc == 5,]$killCount + 1
activePieces[activePieces$XLoc == 8 & activePieces$YLoc == 5,]$YLoc = 6
activePieces[activePieces$XLoc == 8 & activePieces$YLoc == 6,]$XLoc = activePieces[match(lastMove$PieceID,rownames(activePieces)),]$XLoc
activePieces[match(lastMove$PieceID,rownames(activePieces)),]$Taken = 1
validMove = 1
}
else if(choice == "O-O" & canCastleKingside(activePieces, pieceCol) == T){
activePieces[activePieces$Type == "King" & activePieces$Colour == pieceCol,]$XLoc = 7
activePieces[activePieces$Type == "Rook" & activePieces$Colour == pieceCol & activePieces$XLoc == 8,]$XLoc = 6
validMove = 1
}
else if(choice == "O-O-O" & canCastleQueenside(activePieces, pieceCol) == T){
activePieces[activePieces$Type == "King" & activePieces$Colour == pieceCol,]$XLoc = 3
activePieces[activePieces$Type == "Rook" & activePieces$Colour == pieceCol & activePieces$XLoc == 1,]$XLoc = 4
validMove = 1
}
else if(choice == "resign"){print(paste(opponent, "wins!"))
resign = 1
break()}
else{ print("Invalid choice, try again")}
}
}
if(resign == 1){break()}
if(nrow(activePieces[activePieces$Type == "King",]) < 2){
print(paste(pieceCol, "wins!"))
}
lastMove = bestMove
i = i + 1
}
}