movenumber

The movenumber filter consists of the single word movenumber followed by a range, such as

    movenumber 1
    movenumber 10 20

A movenumber filter is true in a position if the move number of that position lies within the range.

The movenumber filter can be counted in which case it returns the move number of the matched move.

initial

The initial filter consists of the single word initial and is true of a position that is the first position of the game. It is equivalent to

    not previous* .

terminal

The terminal filter consists of the single word terminal and is true of a position that has no successors in the game. It is equivalent to

    not next* .

Examples