a)
1.Bg6 Nd6 2.Kc5 Nb7+ 3.Kd4 Nh2 4.Ke3 Kb2 5.Bh5 Nc5 6.Be2 Nb3 7.Bg3 Nc1 8.Bc4 Ng4+
9.Kf3 Nh6 10.Be6 Nb3 11.Be5+ Kc2 12.Bd5 Nd2+ 13.Kf4 Nf1 14.Bg7 Ng4 15.Be4+ +-
  15.K×g4? Ne3+ =
    14…Ne3 15.Be4+ +-
  15.K×e3? Nf5+ =
12…Nc5 13.Bd4 +-
    10…Nd3 11.Bd6 Kc3 12.Ke3 +-
    8…Kc3 9.Ba6 Ng4+ 10.Kf3 Nf6 11.Be5+ +-
10…Nh6 11.Bf4 +-
  6…Kc2 7.Bg3 +-
    5…Nd6 6.Kf4 Nb5 7.Kg3 Nf1+ 8.Kf2 +-
  6…Nf1 7.Be2 +-
  6…Kc2 7.Be2 +-
4…Nd6 5.Kf4 Nc4 6.Bd3 Nf3 7.Bc3+ +-
7.K×f3? Ne5+ =

b)
1.Bc3+ Ka2 2.Be4 Ne2 3.Bd5+ Kb1 4.Be5 Ne7 5.Bf3 Ng1 6.Be4+ Kc1 7.Bf6 Ng8 8.Bg5+ Kd1
9.Bd5 Nh3 10.Bh4 Nh6 11.Be6 Nf4 12.Bb3+ Kd2 13.Bg5 Kc3 14.Ba2 Kb2 15.Bc4 Kc3 16.Kb5
Nf5 17.B×f4 Nd4+ 18.Kc5 Nb3+ 19.Kd5 +-
    2…Kb3 3.Bg7 Kc4 4.Bb1 Ne7 5.Ba2+ Kb4 6.Bf8 +-
  3…Ne7 4.Bf8 Ng8 5.Bd5+ +-    (Author)