A pawn down, Adams was happy to take the draw with 42...Bxf2+ 43.Kxf2 Qc2+, when White has no way to escape the perpetual check. In fact, though, Adams could have won with 42...Qe4! when there is no satisfactory way to escape the mate threat 43...Be5+ 44.f4 Qxf4+ 45.Kg2 Qg3+ 46.Kf1 Qf3+ 47.Kg1 Bd4+ 48.Kh2 Qf2+ 49.Kh1 Qg1#. If White gives his king a flight square on f2 with 43.f3, then he gets mated by 43...Qe1+ 44.Kg4 Qg1+ 45.Kf4 e5+ 46.Ke4 Qe3+ 47.Kd5 Qxf3#; 43.Qxh7+ also leaves White doomed after 43...Kf8: for example, 44.Qh6+ Bg7 45.Qh4 Be5+ 46.f4 Qe1+ 47.Kg4 Qe2+ 48.Kg3 Bc3, and white has no defence to ...Be1; or 44.Qd7 Be5+ 45.f4 Bxf4+ (more simply, something like 45...Qxf4+ 46.Kg2 Qxg5+ 47.Kf2 Qg3+ 48.Ke2 Qg2+ 49.Kd1 Qxa2 also wins) 46.Kf2 Be3+ 47.Kf1 Qf3+ 48.Ke1 Qf2+ 49.Kd1 Qf1+ 50.Kc2 Qc1+ 51.Kb3 Qc4+ 52.Kb2 Bd4+ 53.Kb1 Qd3+ 54.Kc1 Be3+, and White loses his queen (with mate soon to follow).