When playing online, you have the option to premove (enter the next move, before it is your turn). I am wondering whether there are (generally useful, not contrived) situations where say you have 20 moves to mate with perfect play, but with little time you might be better off going for a longer mate in 30 moves which you can largely premove.
As an example: For the simple endgame rook+king vs bare king, I am aware of two techniques:
- gradually decreasing the available space for the enemy king in both horizontal and vertical directions. This can be done without giving check and requires the king to protect the rook most of the time
- gradually decreasing the available space for the enemy king in one direction only (horizontal or vertical) by giving check from the side when the kings are in opposition
I believe the first method is quicker, however the second might be easier to premove (not sure).