The eternal problem
The eternal problem of chess is: how best to make the next move? I can see three ways of thinking about the next move in chess. The first is looking at promising moves and calculating lines. The second is generating ideas for how to attack and defend. This means devising tactics and strategy. Finally, there is the game pattern view: how is this game going to develop? This idea applies especially in quiet positions, ones where there are no obvious ways to proceed, such as in the early middle-game and in the endgame.