Good Morning Puzzlers, The best move is: 1. Rxb7 Principle: The Pawn at c5 can fork King and Bishop if it moves to c6, but the Rook at c7 gards the forking square. So White must distract the gard, first White takes the Bishop off the board: 1. Rxb7, pinning the Rook. Now if Black takes the Rook: 1... Rxb7 2. c6+ Kc7 3. cxb7 and Black only has Pawns. Or if Black tries to run: 1... Kc6 {or Kc8 or Kd8} 2. Rxc7, and Black still only has Pawns and White keeps the C-Pawn as well!