Complex sentence: During the war six of the greens were involved in a scheme to build a rifle range which raised fears about the state of the course but in late 1919 it was decided that there would be no difficulty in getting the course ready for the 1920 Championship.
Split into simpler sentences: During the war, six of the greens were involved in a scheme to build a rifle range. This raised fears about the state of the course, but in late 1919 it was decided that there would be no difficulty in getting the course ready for the 1920 championship.