#include <stdio.h>
#include <stdlib.h>

void FIRSTMOVE_B (int i,int j,int x,int y){
    if (board[i][j]==&rook_b || board[i][j]==&bishop_b || board[i][j]==&king_b || board[i][j]==&queen_b){
        printf("ERRROR ! Move is not valid try again.");
     }
    else if (board[i][j]==&pawn_b){
            if((x==i+1&&y==j)||(x==i+2&&y==j)){
                board [x][y]=&pawn_b;
                 if ((i%2==0&&j%2==0)||(i%2==1&&j%2==1)){
                     board[i][j]=&block_b;
                }else{
                     board[i][j]=&block_w;
                }
                printBoard();
            }
            else {
                 printf("ERRROR ! Move is not valid try again.");
            }

    }else if (board [i][j]==&knight_b){
        if (board[x][y]==&rook_b || board[x][y]==&knight_b || board[x][y]==&bishop_b || board[x][y]==&king_b || board[x][y]==&queen_b ||
             board[x][y]==&pawn_b){
              printf("ERRROR ! Move is not valid try again.");
        }else {
            if ((x==i+2&&y==j+1)||(x==i+2&&y==j-1)||(x==i-2&&y==j+1)||(x==i-2&&y==j-1)||(x==i+1&&y==j+2)||(x==i+1&&y==j-2)||
                (x==i-1&&y==j-2)||(x==i-1&&y==j+2)){
                        board[x][y]=&knight_b;
                   if ((i%2==0&&j%2==0)||(i%2==1&&j%2==1)){
                         board[i][j]=&block_b;
                   }else{
                        board[i][j]=&block_w;
                   }
                   printBoard();


            }else {
                 printf("ERRROR ! Move is not valid try again.");
            }
        }

    }
}

void FIRSTMOVE_W (int i,int j,int x,int y){
    if (board[i][j]==&rook_w || board[i][j]==&bishop_w || board[i][j]==&king_w || board[i][j]==&queen_w){
        printf("ERRROR ! Move is not valid try again.");
     }
    else if (board[i][j]==&pawn_w){
            if((x==i-1&&y==j)||(x==i-2&&y==j)){
                board [x][y]=&pawn_w;
                 if ((i%2==0&&j%2==0)||(i%2==1&&j%2==1)){
                     board[i][j]=&block_b;
                }else{
                     board[i][j]=&block_w;
                }
                printBoard();
            }
            else {
                 printf("ERRROR ! Move is not valid try again.");
            }

    }else if (board [i][j]==&knight_w){
        if (board[x][y]==&rook_w || board[x][y]==&knight_w || board[x][y]==&bishop_w || board[x][y]==&king_w || board[x][y]==&queen_w ||
             board[x][y]==&pawn_w){
              printf("ERRROR ! Move is not valid try again.");
        }else {
            if ((x==i+2&&y==j+1)||(x==i+2&&y==j-1)||(x==i-2&&y==j+1)||(x==i-2&&y==j-1)||(x==i+1&&y==j+2)||(x==i+1&&y==j-2)||
                (x==i-1&&y==j-2)||(x==i-1&&y==j+2)){
                        board[x][y]=&knight_w;
                   if ((i%2==0&&j%2==0)||(i%2==1&&j%2==1)){
                         board[i][j]=&block_b;
                   }else{
                        board[i][j]=&block_w;
                   }
                   printBoard();


            }else {
                 printf("ERRROR ! Move is not valid try again.");
            }
        }

    }
}