Pawn and Two: <psmith> Fritz 9 agrees that after 11...Kh6, 12.Qd3! is White's best response. Fritz also agrees the best continuation is then 12...g6 13.h5 Bxg5 14.hxg6+ Bh4 15.Qg3 fxg6 16.Rxh4 Kg7 17.Rg4.
After 17.Rg4, Fritz evaluated the position as winning for White.
At this point, Fritz's 2nd choice for Black was (7.34) (19 ply) 17...Rg8 18.0-0-0 Kf8 19.Rh1. Now if 19...Ke8 20.Rh7 or if 19...Qe7 or Qd7 then 20.Nb5!.
At move 17, Fritz's 1st choice for Black is (3.55) (19 ply) 17...Kf7 18.0-0-0.
At this point, Fritz's evaluation for White has increased to (4.77) (20 ply) 18...Nc6 19.Rxg6 Ke8.
Fritz indicates that White's advantage continues to increase. Fritz's evaluation is now (5.05) (19 ply), with a suggested continuation of: 20.Rh1 a6 21.Rh7 Ne7 22.Rgg7 Ra7.
Fritz's evaluation is now (6.37) (20 ply), and it gave the following as it's 1st choice for a winning line for White: 23.Na4 Qd7 24.Qh4 Ng6 25.Rxd7 Rxd7 26.Qh5 Rxh7 27.Qxh7 Ne7 28.Nxb6.