r1b1k1n1/pp1pb3/n1p2p1r/1q2p1pp/P2P2PP/5B2/RPPQPP1B/1N2K1NR b Kq - 1 13
FEN state: r1b1k1n1/pp1pb3/n1p2p1r/1q2p1pp/P2P2PP/5B2/RPPQPP1B/1N2K1NR b Kq - 1 13 ; Best move: b5c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at d7 and black bishop at e7. Black knight at a6, black pawn at c6, black pawn at f6 and black rook at h6. Black queen at b5, black pawn at e5, black pawn at g5 and black pawn at h5. White pawn at a4, white pawn at d4, white pawn at g4 and white pawn at h4. White bishop at f3. White rook at a2, white pawn at b2, white pawn at c2, white queen at d2, white pawn at e2, white pawn at f2 and white bishop at h2. White knight at b1, white king at e1, white knight at g1 and white rook at h1. White kingside and black queenside castles are available. Half move number is 1. Full move number is 13. Black to move.