Hello All, My solution: 1. -Nxd4+ 2. N3xd4 Bxd4 3. Nxd4 (White seeks to keep a knight on its c2 rook.) Rxc2 4. Nxc2 Nc3+ (royal fork against d1 rook and e2 king) 5. Kd2 Nxd1 (Black knight takes white rook.) 6. Kxd1 (White king takes black knight.) Edward Zolotarevsky