Solution to the algorithm

check.py

from pieces import *

blackKing = (5,8)

pawn = Pawn(7,2)
print("Pawn moves: ",pawn.possibleMoves())
for pos in pawn.possibleMoves():
    if king == pos:
        print("Check by the pawn!")

tower = Tower(5,3)
print("Tower moves: ",tower.possibleMoves())
for pos in tower.possibleMoves():
    if king == pos:
        print("Check by the tower!")

bishop = Bishop(2,7)
print("Bishop moves: ",bishop.possibleMoves())
for pos in bishop.possibleMoves():
    if king == pos:
        print("Check by the bishop!")

queen = Queen(3,2)
print("Queen moves: ",queen.possibleMoves())
for pos in queen.possibleMoves():
    if king == pos:
        print("Check by the queen!")

knight = Knight(6,6)
print("Knight moves: ",knight.possibleMoves())
for pos in knight.possibleMoves():
    if king == pos:
        print("Check by the knight!")