Rapid Discouragement

Sometimes, when a chess game is suddenly not going the way it "should", a player will lose interest and resign. Much better to start over in another game with a full set of pieces! This seems to be the case for Black in the following game - at move 6 he received a shock (and a piece) but he kept his cool and had a fairly pleasant position after move 8. Ten moves later, he resigned.

Wall,B - Mkvibes
PlayChess.com, 2012

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Nc3 h6 5.d3 Bc5 6.Bxf7+ Kxf7 

Here we have a Semi-Italian Four Knights Jerome Gambit, where White has temporized with d2-d3 instead of 0-0 -- which he takes care of on the next move.

7.0-0 Rf8 8.Qe2 Kg8 

Black has castled-by-hand. What will he do next? Bill is willing to wait and see.

9.a3 Nd4 10.Nxd4 exd4 11.Na4 b6 12.e5 Nd5 

Time to complicate further.

13.Bxh6 gxh6 14.Qe4 Qg5

Not the best reply. Bill's response leads to his opponent's rapid discouragement.

15.Qxd5+ Kh7 16.Qxa8 Rg8 17.Nxc5 bxc5 18.f4 Black resigned

Black's position is not horrible, but he has nothing going for him; plus he is down an exchange and two pawns. And that light-squared Bishop...