adrian17

import itertools
from copy import deepcopy

def possible_combinations(values, n, total):
	# generate all combinations of given values with given sum
	return [combination for combination in itertools.combinations(values, n) if sum(combination) == total]

def make_aval(board, clues):
	"""
	Generates a set of all digits you can use in each cell, just like you do in sudoku board