My System... study problem

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ForzaJuve

Since my last question was answer so well here on chess.com on thought I'd add the next question.

In chapter 3 he speaks of the

"drawing apparatus Rook +Knight" in regard to feature fo 7th rank.

I don't understand and hoping someone can explain this feature to me

khpa21

Maybe he means this game: http://www.chessgames.com/perl/chessgame?gid=1272756