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In chess, a sacrifice is a move that gives up a piece with the objective of gaining tactical or positional compensation in other forms. A sacrifice could also be a deliberate exchange of a chess piece of higher value for an opponent's piece of lower value.
Any chess piece except the king may be sacrificed. Because players usually try to hold on to their own pieces, offering a sacrifice can come as an unpleasant surprise to one's opponent, putting them off balance and causing them to waste precious time trying to calculate whether the sacrifice is sound or not, and whether to accept it. Sacrificing one's queen (the most valuable piece), or a string of pieces, adds to the surprise, and such games can be awarded brilliancy prizes.[2]
6.Bxf7+ Kxf7 7.Ng5+ Kg8 8.Ne6 Qe8 9.Nxc7 Qg6 10.0-0 (10.Nxa8? Qxg2 −/+) 10...Rb8 11.dxe5 Nxe5 (11...dxe5 12.f4 =/∞) 12.Kh1 Qh5 13.f3 h6 14.Qd4 Nc6 15.Qd3 Qa5 16.N7d5 =/∞ S. Mirkovic