Mateo: Sometimes some players try, against stronger opponents, to trade pieces to reach a draw. But Andersson showed in many games how to convert a small pressure in a win. Most of the times, his opponent after a long and difficult defence, with some hopes of a draw, blunders.Here, before time control, Black played the natural 38... Ne5?, which loses. He should have played 38... Ne7, with a small edge for White.
Now, after 38... Ne5? 39. Rd4, White threatens Rbd1, winning the d pawn.
39... Ng6 (so that after 40. Rbd1, Black can defend the pawn with 40... Ne7). But Black loses control of the c6 square.
After 40. c6 bc 41. bc, Black cannot defend the d pawn with 41... Rd6, because White plays 42. Rd5! Rd5 43. Bd5, wins for White. So he loses thge d pawn and the game.