After move 15 White's Queenside Bishop shows signs of life. White must hasten with his Queen
to defend the f pawn, and Black prepares to double his rooks. Despite providing an eventual
target for the Black bishop at d7, White decides the chase the Black Knight back with h3.
15. Nc4 Nfg4
16. Qe1 Rf7
17. h3 Nf6