[FEN "7Q/8/8/8/4kq1N/1K6/8/8 w - - 0 1"] 1. Qa8+ {1...Kd4 2.Qa4+ and the King is forced to either e3 or e5.} 1... Kd3 2.Qa6+ {2...Kd4 or Ke4 then 3.Qc4+ forces the to King to e3 or e5.} 2... Kd2 3.Qa2+ {3...Kd1 4.Qc2+ Ke1 Ng2+} 3... Kd3 4. Qc2+ Kd4 5. Qc4+ {And the King is forced to go to either e3 or e5 and meet the Knight fork.}
@greenpawn34said White did not play 76 Qd6 forcing off the Queens and the g-pawn promotes
Instead they played 76. Kh4 and Black picked up the Knight with 76...Qh7+
So many players spend all their time learning openings and searching for traps and tricky gambits. They'd be better off gaining an instinct for the end game. At my club, I've seen more than one game drawn unnecessarily because one player didn't realise how to create a passer, and the other just lucked into it; and also lost, because the defender had no idea how to stop a pawn.