I know how to play chess and everything, and I can play well and all, but I don't know the cooridinates or grid language or what ever people keep using to explain moves. Of coarse Nd4 means Knight to "d4" on the board, right? But then i see like an "x" or a "+". what do those mean? Also, i see Nd4 f5 or something like that. Could someone please explain this to me?

well ...    +  means check  x means takes or capture   B= Bishop N=knight K=King R=Rook pawns as u know is represented by the move it makes ie e4 or  e2 - e4

this ( - ) means to or go from one place to another   # means checkmate +- means white has a large advantage  ( -+ ) means the same thing but for black( +_ ) means white with small advantage usualy positional and visa versa for black let me know if u want anymore explanation, or better still look it up in a book or in the rules on this site ok...

Nd4 f5 means knight on d4 goes to f5 square ok

ep means en passant

+ means check, x means a capture on that square. So exd4 would mean a pawn capture on d4 I beleive. Nxd4 would be knight take d4. # means checkmate, ! means a good move, !! means a very good often game winning move, ? is a doubtful or bad move, ?! is a surpising and perhaps good move. Q=queen, N=knigh, pawn=no letter, R=Rook, B=bishop, K=king. Anything else?

What about castling? what means that?

o-o kinside o-o-o queenside go look up the rules dude ok

also don't forget about pawn promotion. e8=Q for example for promotion to queen right?