lenadroid

Ingredients: 

2 stewpans - one is main = 5 litres, second is for beet

potatoes - 12 items of average size, neither big nor small

beet - 4 items of average size

meat - a piece of pork without fat, size about 10x17x7 santimeters

mythz

#full source: https://github.com/dartist/sudoku_solver/blob/master/benchmarks/sudoku.py

def cross(A, B):
    "Cross product of elements in A and elements in B."
    return [a+b for a in A for b in B]

digits   = '123456789'
rows     = 'ABCDEFGHI'
cols     = digits
squares  = cross(rows, cols)