peterdrake, Doing the counting problems in chapter 2 of Ogawa & Davies's "The Endgame". I'm getting correct or close to it on most of them, but the thought of doing this under the time pressure of a game, remembering (without pencil and paper) the results of several local searches so I don't have to re-read them every turn, and still having the mental capacity to explore the main tree of play? shudder