Figure[White to move]

Perhaps the most obvious pattern of interest on the board is the alignment of Black’s king and rook on the fifth rank. The most obvious, but not the most useful; more significant is the alignment of the two Black rooks on the same diagonal—another clustered pair. In this case the rooks are on light squares, so White finds his light-squared bishop and charts the course Be8. Black doesn’t have time to save both pieces; the best he can do is play the rook on g6 to h6 so that it can recapture after White plays BxR. White nevertheless wins the exchange. Notice that a search for Black loose pieces would have turned up this idea as well: having found the loose rook on h5, you look at ways to attack it on every one of its lines, including the seemingly remote diagonal leading to e8.