Esempio n. 1
0
def backtrackingRecursiveMRVcp(board,board_size,small_row,small_col):
    global checks
    #base case
    if func.boardFull(board,board_size) :
        return True,checks


    minPos,board_dict_list=func.findNextPosMRV(board,board_size,small_row,small_col) # find the next MRV pos and list of values
    unassigned_row=int(minPos/board_size)
    unassigned_col=minPos%board_size

    #update list for LCV sorted
    board_dict_list=func.updateList(board,board_size,unassigned_row,unassigned_col,small_row,small_col,board_dict_list)

    if (board_dict_list==[]):
        return False,checks
    #for every fwd consistent values
    for digit in board_dict_list:
        checks=checks+1
        board[unassigned_row][unassigned_col]=digit
        board_dict=func.updateDict(board,board_size,small_row,small_col,board_dict={})

        if(backtrackingRecursiveMRVcp(board,board_size,small_row,small_col)[0]==True): # recursive calls
            return True,checks

        board[unassigned_row][unassigned_col]=0  # backtracking and reverting last move made
    #check for backward consistency
    if func.backwardConsistent(board_dict)==False:
       return False,checks


    return False,checks
Esempio n. 2
0
def backtrackingRecursiveMRVfwd(board,board_size,small_row,small_col):
    global checks
    #base case
    if func.boardFull(board,board_size) :
        return True,checks


    minPos,board_dict_list=func.findNextPosMRV(board,board_size,small_row,small_col) # find next pos and set of valid moves
    unassigned_row=int(minPos/board_size)
    unassigned_col=minPos%board_size

    #update the list with checks done to see if forward consistency is valid
    board_dict_list=func.updateList(board,board_size,unassigned_row,unassigned_col,small_row,small_col,board_dict_list)

    if (board_dict_list==[]):
                return False,checks


    for digit in board_dict_list:
            checks=checks+1
            board[unassigned_row][unassigned_col]=digit  # assignment of value

            if(backtrackingRecursiveMRVfwd(board,board_size,small_row,small_col)[0]==True): # recursive call
                return True,checks
            board[unassigned_row][unassigned_col]=0  # backtracking and reverting

    return False,checks