(I) 1…nLEc1 2.Rb8 (not 2.Ng1?) nLEh1 3.Ng1 LE5f3‡ (not 4.Sc6?? or 4.Rb7?? - self-checks) (II) 1…nLEb2 2.Rb7 (not 2.Ng7?) nLEh8 3.Ng7 LE5e8‡ (not 4.Sc8?? or 4.Rb8?? - self-checks) Creation of anti-batteries LEO/nLEO; critical moves of the nLEO; black self-blocks realized by the black Nightrider; blocks of black N on the mating moves; self-blocks of bR on b7/b8; anti-duals.