r1kq1b1r/pb2pnp1/1pp2p2/3p3p/PPP1P1PP/5K1N/1R6/1NnQ1BR1 w - - 2 20
FEN state: r1kq1b1r/pb2pnp1/1pp2p2/3p3p/PPP1P1PP/5K1N/1R6/1NnQ1BR1 w - - 2 20 ; Best move: c4d5
The current state of the chess board is: Black rook at a8, black king at c8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at a7, black bishop at b7, black pawn at e7, black knight at f7 and black pawn at g7. Black pawn at b6, black pawn at c6 and black pawn at f6. Black pawn at d5 and black pawn at h5. White pawn at a4, white pawn at b4, white pawn at c4, white pawn at e4, white pawn at g4 and white pawn at h4. White king at f3 and white knight at h3. White rook at b2. White knight at b1, black knight at c1, white queen at d1, white bishop at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 2. Full move number is 20. White to move.