movenumberfilter consists of the single word
movenumberfollowed by a range, such as
movenumber 1 movenumber 10 20A
movenumberfilter is true in a position if the move number of that position lies within the range.
movenumber filter can be counted in which case it returns the move number of the matched move.
initialfilter consists of the single word
initialand is true of a position that is the first position of the game. It is equivalent to
not previous* .
terminalfilter consists of the single word
terminaland is true of a position that has no successors in the game. It is equivalent to
not next* .Examples