The gamenumber filter consists of the single word gamenumber followed by a range, such as
    gamenumber 1
    gamenumber 100 20000
The gamenumber filter matches a position if the game number of the current game lies within the range. The game number of the first game in the input file is 1 and each subsequent game increases the game number by 1.

The gamenumber filter can be a CQL parameter.