Introduced a new position in the database.
The ifes solver has a bug: it doesn't handle correctly positions where the whait has to move.
See the case:

rcrr@whitewater:~/base/prj/reversi/c$ time ./build/bin/endgame_solver -f db/gpdb-ffo.txt -q ffo-43 -s ifes
Entry id:    ffo-43
Description: FFO position 43, white to move, Brightwell vs Suekuni, WC 1997 (final).
Game Position:
    a b c d e f g h
 1  . . @ @ @ @ @ .
 2  . . @ @ @ @ . .
 3  . O O O @ @ . .
 4  . O O @ @ @ @ .
 5  . O O @ @ @ O .
 6  O O O O @ O O .
 7  . . . @ O @ . .
 8  . . @ @ @ @ @ .
Player to move: WHITE

Solving the game position ffo-43 using solver ifes ...
use_parity=4. fastest_first=7.

    a b c d e f g h
 1  . . @ @ @ @ @ .
 2  . . @ @ @ @ . .
 3  . O O O @ @ . .
 4  . O O @ @ @ @ .
 5  . O O @ @ @ O .
 6  O O O O @ O O .
 7  . . . @ O @ . .
 8  . . @ @ @ @ @ .
Player to move: WHITE

[node_count=337498126, leaf_count=39075]
Final SearchNode sn: move=NA, value=10

real	1m15.234s
user	1m14.997s
sys	0m0.092s

rcrr@whitewater:~/base/prj/reversi/c$ time ./build/bin/endgame_solver -f db/gpdb-ffo.txt -q ffo-43-r -s ifes
Entry id:    ffo-43-r
Description: FFO position 43, b/w reversed, black to move, Brightwell vs Suekuni, WC 1997 (final).
Game Position:
    a b c d e f g h
 1  . . O O O O O .
 2  . . O O O O . .
 3  . @ @ @ O O . .
 4  . @ @ O O O O .
 5  . @ @ O O O @ .
 6  @ @ @ @ O @ @ .
 7  . . . O @ O . .
 8  . . O O O O O .
Player to move: BLACK

Solving the game position ffo-43-r using solver ifes ...
use_parity=4. fastest_first=7.

    a b c d e f g h
 1  . . O O O O O .
 2  . . O O O O . .
 3  . @ @ @ O O . .
 4  . @ @ O O O O .
 5  . @ @ O O O @ .
 6  @ @ @ @ O @ @ .
 7  . . . O @ O . .
 8  . . O O O O O .
Player to move: BLACK

[node_count=339820236, leaf_count=40017]
Final SearchNode sn: move=NA, value=-12

real	1m16.930s
user	1m16.865s
sys	0m0.004s