While poring through some of the "old" games, I noticed this interesting tactical trick. This is in the game Portisch v Garcia Palermo, Reggio Emilia 1992.
The actual move played by Black was 57. ... Rb4+ and Portisch proceeded to win this game a few moves later.
The problem with the position lies in this. What if Black had instead played 57. ... Rh2? (as highlighted in the diagram)
Is there a problem with this move? If so, why?
White to play.
The answer can be found by highlighting between the brackets
[57... Rh2 58. Qf8+ Rg7 59. Qf6+ Rg6 60. Qh8#]