B-2. Kf1. Bd3+.
B1- 3. Ne2. Be3+. 4. Qf7. Rxf7#
B2- 3. Re2. Bxe2+. 4. Nxe2. Bg3+.
B21-5. Kg1. Bxc7 and black wins easily with Q+B+2R against B+2N+R
B22-5. Nf4. Rd4xf4+. 6. Kg1. Rf1+. 7. Rxf1. Rxf1+. 8. Kxf1. Qe1#.
C- 2. Kh1. Bxe1 and black is a R up. And a devastating mating attack. Immediate threat would be the weak f1 square when the BWSB moves threatening Rf1#.
1……. Bxf2+!
A-2. Kxf2. Bb1+!!! 3. Qf7. Rxf7+. 4. Kg1/3. Qxe1#
B-2. Kf1. Bd3+.
B1- 3. Ne2. Be3+. 4. Qf7. Rxf7#
B2- 3. Re2. Bxe2+. 4. Nxe2. Bg3+.
B21-5. Kg1. Bxc7 and black wins easily with Q+B+2R against B+2N+R
B22-5. Nf4. Rd4xf4+. 6. Kg1. Rf1+. 7. Rxf1. Rxf1+. 8. Kxf1. Qe1#.
C- 2. Kh1. Bxe1 and black is a R up. And a devastating mating attack. Immediate threat would be the weak f1 square when the BWSB moves threatening Rf1#.
1.Bxf2+ Kxf2 2.Bb1+ Kg3/Kg1 3.Qxe1#
1…. Kf1 2.Bd3+ Re2 3.Bxe2+ Nxe2 4.Bg3+ Kg1 5.Bxc7
1…. Kh1 2.Kxh1 Bxe1
I’m really not sure where the Kxh1 move came from.
1…Bxf2
2. Kh1 Bxe1
3. Qe5 Qxe5
4. Nxe5 Bb1
5. Nf3 Bxc3
6. Rxb1 Bxb2
7. Nxg5 Rf2
It’s a winning position for black