Chess in codea

I see the last part is one of the built in assets

@abeswick Hope this explaines what I’m doing for the knight. I’m also working on the valid moves of the other pieces. I’ll hold off posting those just in case you want to work them out.

``````function knightMoves(x,y,p)

tab={-1,2, 1,2, 2,1, 2,-1, 1,-2, -1,-2, -2,-1, -2,1,}

— this is how the knight moves in 8 directions, it’s x,y values. The first pair -1,2, is 1 square left and 2 squares up. The second pair 1,2 is 1 square right and 2 squares up. The other values are the other 6 moves.

for z=1,16,2 do
x1=x+tab[z]
y1=y+tab[z+1]

— this iterates thru the tab table, getting every 2 positions to put the pair of values in x1 and y1 and adds those to the current knights position.

if x1>0 and x1<9 and y1>0 and y1<9 then
pos=pieceTab[x1][y1]
if pos=="" then
validMoves[x1][y1]="."
end

— this makes sure to only use the x1, y1 values if it’s on the board 1 to 8 in either direction. If it is, it moves whatever is on the board at the x1,y1 square to the variable pos. If pos is blank, then that’s a possible move.

if p==wn then
if pos==bk or pos==bq or pos==bb or
pos==bn or pos==bc or pos==bp then
validMoves[x1][y1]="."
end
end

— if we’re using a white knight (wn) and what’s at pos is a black piece, then those are valid moves.

if p==bn then
if pos==wk or pos==wq or pos==wb or
pos==wn or pos==wc or pos==wp then
validMoves[x1][y1]="."
end
end

— if we’re using a black knight (bn) and what’s at pos is a white piece, then those are valid moves.

end
end
end
``````

Thanks, yes that all makes sense I think :). No worries I’m going to try to have a go at coding the other pieces, will let you know if I get stuck