Solution
1… Rxb2 2. Rxb2 Bxd4+ (fork) followed by Bxb2, wins a piece in the process.
1… Rxb2 captures the defender of the d4-knight.
1… Rxb2 2. Rxb2 Bxd4+ (fork) followed by Bxb2, wins a piece in the process.
1… Rxb2 captures the defender of the d4-knight.