div.chess_board div.chess_square_light {
    background-color: #F0D9B5;
}
div.chess_board div.chess_square_dark {
    background-color: #B58863;
}

div.chess_board div.chess_square_light.chess_square_selected {
    opacity: 0.5;
    background-color: #F0D9B5;
}
div.chess_board div.chess_square_dark.chess_square_selected {
    opacity: 0.6;
    background-color: #B58863;
}

div.chess_board div.chess_player_white.chess_piece_pawn:after,
div.chess_board div.chess_player_white.chess_piece_rook:after,
div.chess_board div.chess_player_white.chess_piece_knight:after,
div.chess_board div.chess_player_white.chess_piece_bishop:after,
div.chess_board div.chess_player_white.chess_piece_queen:after,
div.chess_board div.chess_player_white.chess_piece_king:after,
div.chess_board div.chess_player_black.chess_piece_pawn:after,
div.chess_board div.chess_player_black.chess_piece_rook:after,
div.chess_board div.chess_player_black.chess_piece_knight:after,
div.chess_board div.chess_player_black.chess_piece_bishop:after,
div.chess_board div.chess_player_black.chess_piece_queen:after,
div.chess_board div.chess_player_black.chess_piece_king:after {
  content: '';
}

div.chess_board div.chess_player_white.chess_piece_pawn {
  background-image: url('/img/chesspieces/wP.png');
}
div.chess_board div.chess_player_white.chess_piece_rook {
  background-image: url('/img/chesspieces/wR.png');
}
div.chess_board div.chess_player_white.chess_piece_knight {
  background-image: url('/img/chesspieces/wN.png');
}
div.chess_board div.chess_player_white.chess_piece_bishop {
  background-image: url('/img/chesspieces/wB.png');
}
div.chess_board div.chess_player_white.chess_piece_queen {
  background-image: url('/img/chesspieces/wQ.png');
}
div.chess_board div.chess_player_white.chess_piece_king {
  background-image: url('/img/chesspieces/wK.png');
}

div.chess_board div.chess_player_black.chess_piece_pawn {
  background-image: url('/img/chesspieces/bP.png');
}
div.chess_board div.chess_player_black.chess_piece_rook {
  background-image: url('/img/chesspieces/bR.png');
}
div.chess_board div.chess_player_black.chess_piece_knight {
  background-image: url('/img/chesspieces/bN.png');
}
div.chess_board div.chess_player_black.chess_piece_bishop {
  background-image: url('/img/chesspieces/bB.png');
}
div.chess_board div.chess_player_black.chess_piece_queen {
  background-image: url('/img/chesspieces/bQ.png');
}
div.chess_board div.chess_player_black.chess_piece_king {
  background-image: url('/img/chesspieces/bK.png');
}