Dynamic Sized Chessboard in Python using Turtle Module.

 from turtle import *

#Function to draw the box of given size and color

def box(size,color):

    pd()

    fillcolor(color)

    begin_fill()

    for i in range(4):

        fd(size)

        rt(90)

    end_fill()

 

speed(10)

pu()

size=50

x=-size*4

y=size*4

goto(x,y)

pd()

bx=1

for row in range(8):

    for col in range(8):

        if (bx+row)%2 == 0:

            box(size,'blue')

        else:

            box(size,'yellow')

        bx+=1

        x=x+size

        goto(x,y)

    y=y-size

    x=-size*4

    pu()

    goto(x,y)

    pd() 

mainloop()