Lukas Jutkiewicz scored a minute after coming on as a substitute to earn Birmingham a precious Championship point at Hull City.
The Birmingham club captain watched from the bench as Ozan Tufan got the final touch to put the Tigers ahead in the first half, with Blues players adamant he had used his arm to beat goalkeeper John Ruddy.
Birmingham, who began the night level on points with third-from-bottom Stoke, struggled to make inroads against a Hull side looking to strengthen its grip on the sixth and final play-off spot.
Caretaker Blues manager Mark Venus had made a quadruple substitution on the hour mark as his team were frustrated, but it was the appearance of Jutkiewicz - who also scored the Birmingham goal in the 1-1 FA Cup draw between these two in January - that proved to be the telling moment.