The failure database, as implemented in our system, is a simple text file. For the purposes of example, Figure 5 shows the first three failures from the failure database in the experiment where 1,000 games of tic-tac-toe were played.
The first line of the failure database specifies the number of failures in
the failure database. Then for each failure in the failure database, a
unique tic-tac-toe board is specified along with the coordinates of the
move which lead to failure in the specified tic-tac-toe board, 
.
The coordinates are in 
format, where
{
}.
A unique tic-tac-toe board is specified first by the player, 'X' or 'O,'
whose turn it is to move, and then by the tic-tac-toe board itself. The entire
file or failure database, in our implementation, is a plain text file.
