Black's only legal move is to avoid check by protecting his King and of the three ways, two are open to him, i.e., capturing the attacking Pawn, and moving the King. The latter play is preferable and his King commands two squares; Q2 and Ktsq. If the former move were made, White would take the KB with his Pawn, discovering check with the Queen and again Black would have to make a move to avoid the check. Thus, Black's correct move is K—Ktsq.
| 10, | P×B? |
| Kt.—B3! |
(10) White captures the adverse Bishop with his Pawn, but he leaves the file open to the Black Rook who can capture the Queen. As White has now taken four adverse forces this play of his, ordinarily, would not have been a bad move, but as a matter of fact it loses the game for him. The student should note the question mark (?) after the notation of White's play. White can also take the Rook which captures the Queen with his Knight if Black
