The Dilworth Attack is one of the most interesting lines in thr Ruy Lopez. Black gives up two pieces in return for a rook and two pawn, with excellent attacking prospects. In most cases, White weathers the storm but must then play a complicated endgame. This works to Black's advantage, since Black is more likely to be familiar with the typical endgame structures and strategies. The Dilworth continues to be seen at the highest levels of chess, especially in the hands of Artur Yusupov. 

In this, the first ever monograph devoted to the line, noted author Eric Schiller explains all of the critical ideas in the opening and endgame, and provides many examples of each from tournament play. With this weapon in your arsenal for Black, the Spanish Inquisition can prove to be the most unpleasant experience for White.