rnq1kbr1/2p1p2p/p4p1n/1p1p2p1/1PBQb3/2P3P1/PB1P1P1P/RN2K1NR w q - 0 16
FEN state: rnq1kbr1/2p1p2p/p4p1n/1p1p2p1/1PBQb3/2P3P1/PB1P1P1P/RN2K1NR w q - 0 16 ; Best move: c4d5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at c8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at c7, black pawn at e7 and black pawn at h7. Black pawn at a6, black pawn at f6 and black knight at h6. Black pawn at b5, black pawn at d5 and black pawn at g5. White pawn at b4, white bishop at c4, white queen at d4 and black bishop at e4. White pawn at c3 and white pawn at g3. White pawn at a2, white bishop at b2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white king at e1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 16. White to move.