If you understood the point of the last puzzle, you should find it easier to deal with this position from an actual game, Colle-Gruenfeld, Carlsbad, 1929.

Solution:

Again, this time in over the board play, you see that a king move is key to winning this for White: 1.f5 gxf5 2.g6 f4+ 3.Kg2 [The wrong king move only draws: 3.Kh2 f3 4.g7 f2 5.g8=Q f1=Q] 3...Ke2 (3..f3+ 4.Kf1) 4.g7 f3+ 5.Kg3 f2 6.g8=Q f1=Q 7.Qc4+ Ke1 8.Qxf1+ Kxf1 9.Kf4 Ke2 10.Kg5 Kd3 11.Kxh5 Kc4 12.Kg4 Kb4 13.h5 Kxa4 14.h6 Kb3 15.h7 a4 16.h8Q a3 17.Qa1 with an easy win. The idea of 3.Kg2 was to force the Black king to e2 so the queen check on move 7 would win. When you play concrete endings (ones that can be calculated out), you have to do the work to make sure your moves are precise and best.

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