You'd only need 4 pieces to seal off the corners - one in each corner. They also can't be captured once in a corner, so the only way white would have a chance would be to limit black to those four pieces and force one of them to move.
(piilota) Haluatko nopean pelin, joka päättyy varmasti kahdessa tunnissa? Luo haluamasi pelityypin peli ja aseta peliajaksi 0 päivää / 1 tunti. (TeamBundy) (näytä kaikki vinkit)