Now we're down to the usual exchange sacrifice. Once again Black has two extra central pawns, though the d-pawn is further advanced, which leaves it vulnerable and also creates some weak squares.

Later White missed some more critical points and quickly lost the game.

There may well be good reasons to let the opportunity pass you by! Clearly (re-) capturing is the natural thing to do.

Oops! It's so easy to forget about this, as recapturing with 19.exd5 is the natural thing to do or expect.

Black also had to watch out for the 21.Nf6+ discovered check, winning the queen.

A nice finishing touch. Black resigned.

Avoiding the drawish tendencies of a pawnless center, which was quite important in this must-win last-round Olympiad game. Black is also left with a rather isolated outpost on e4, the vulnerability of which White will try to prove.

An ambitious move, with which Black aims to get rid of the strong Ne5 and perhaps support the e4-pawn later.