We will see with some examples of how useful is the invasion of one (or two) rook at the 8th (or 1st) rank.

the rooks on the 8th and 7th rank are very powrefull

thanks aristeidis9- again interesting subject

nice

impressive tactics there ty

WONDERFUL!!! Give me more :)

Thanks for these! Comment: another theme here seems to be: luring away the defendant(s) of the back rank.

thanks

nice ones 

easy puzzles

Very-very good!

Fear of the beginner

Thanks aristeidis9!

very nice

and cool

Here a classical example. A bit more complicated as you'll see (after solving it, you can replay the game):

Excelent