We also analyzed the data by grouping the possible locations of the tic-tac-toe
grid into three separate categories: corner, middle, and side with corner as the
four corners, middle as the center square, and side as the remaining squares. The
number of occurrences of Xs were summed up and displayed on a graph with the
x-axis representing the number of Xs in the middle square, the y-axis representing
the number of Xs in the side squares, and the z-axis. A gradient between yellow
(for more X victories) and white (more X losses) was used to encode the percent
of victories for X in that location. The size of the data point was determined by
the number of overlapping data points at a given location in the graph.