Reduction

[RobertJasiek]

The point about obvious is that there should be only one obvious point. Reductions and vital points often allow several choices, because there can be several of them in a local position, not infrequently half or more than half of the available intersections. An obvious reduction is nice, but only if it is obvious. Otherwise, it can easily be necessary to verify every reduction, vital point and other interesting move as a candidate for one of the best next correct moves.