Both chess play and psychological research offer rewards to their participants in the form of intellectual satisfaction. It seems to follow that combining these two forms of activity, by carrying out research into chess play, should be a particularly engaging enterprise. In the mid-1980s enough was now known for it to be feasible to tell a reasonably satisfying story by piecing together the accumulated results of experiments on chess. There were remaining gaps in knowledge, but the structure of chess skill had at least become sufficiently evident to exhibit where the gaps lay. Originally published in 1985, this book was an attempt to summarize the progress that had been made at the time, recounting some of the components of the research process while describing how the chessplayer seems to think, imagine, and decide.