Morozevich, A. – Mamedyarov, S.

2656 2018 · Black wins (resignation, time or agreement)

Scotch Game, 2018: Morozevich (2656) against Mamedyarov (2817). White comes out of the opening in good order, but the whole game turns on two moves. On move 27, 27.Qxa7 throws away the balance: the evaluation swings from −0.2 to −10.8 from White’s side. One move later, 28.Kh2 deepens the collapse, from −9.4 to −15.0, and 28...Qf4+ settles matters. The accuracy figures tell the story: 82% for White, 93% for Black, with a single White blunder — but it costs everything. Club takeaway: in a level position, the opponent’s active queen matters more than a pawn to be collected.