Solution to Sudoku no 735

This is the solution:

This is the winning answer sent in by Freddy Vargas:

Chess Solution no 27

1. f3 captures the black rook on the next move.

If

1. ... Rg8

2. Qh7+ also captures the black rook on the next move.

Chess Puzzle no 27

This position is from Timo Paakkonen (2283) versus Tuomo Halmeenmaki (2154), which was played in 2012. White to move. What should he play?

 See answer